Unfortunately salmon in our local waters can be finicky and the tactics and gear needed can vary from place to place and from species to species just within the Puget Sound. There isn't one tried and true method that works all the time everywhere....
I'm assuming since you mentioned DR's that you'll be predominately trolling. First things first I'd make sure I have some extra terminal gear for your downrigger.
-A few extra clips, a few extra balls, snubbers, terminal repair kits, wire clippers, needlenose pliers...Gotta be prepared in case a DR needs some repairing done while on the water. Trust me, it happens, and you'll be glad you have the extra gear when you really do need it.... Don't want to only be down to one DR when the fishing is good....ATLEAST have one extra clip/ball/snubber/repair kit.
I'd also make sure to have an extra spool of mainline in case you need to fill up a spool on the water. Pline CXX gets my business, 15, 17 or 20 lb test are all good. 25 lb CXX is overkill cause its breaking strength is almost twice the lb test on the label on the box.... 15 for silvers, 20 for kings. Change your line a few times a year if ya can.
Also, pick up a few leader rolls. Maxima UG monofilament does the trick for me. I have 15, 20, 25 lb test rolls for all my spoons/hardware and have 40 lb test for tying up hootchies so I have a nice stiff leader to maximize the amount of "whip" i get from my flashers...
These things are great to have on board.
http://images.cabelas.com/is/image/cabe ... main-Large$
I tie these to my mainline and just unsnap them when I want to change out leader/lure setups. I have three tackle boxes on board my boat. One with all my flashers/lures/spare tackle etc. One is for all my extra terminal gear for my DR/boat (stuff I mentioned above and stuff like wrenches/screwdrivers/flashlights) and then lastly I have a small box where I have anywhere from 5-10 flashers/lure setups already pretied. This way, I can have a bunch of setups already ready so all I have to do is unsnap my swivel and just swap flasher/lure combos like that. Note: A 2 pack is like 3-4 bucks so they aren't cheap but they are worth it. It also helps when your running your boat on plane because when folks have their rod in their holders, the wind really spins those flashers and that leads to line kinkage. I ALWAYS take my flashers off my rods when I put my rods in my holders when I'm running the boat on plane.
For flashers, I like to have a bunch of options. It's important to have a few different setups in both the 8" and 11 inch flashers. 11 inch are great for kings, but for Coho I stick with 8 inchers. I don't run dodgers much but I do have a few 00 and 0 dodgers in my arsenal. Standard silver ones. Although I can't remember the last time I fished one. Flashers are what I fish. My 4 favorite colors are green, light green, red and the holographic UV. For the colored flashers, I have them in both the plain silver and the glow in the dark mylar finish...
http://www.hotspotlures.com/products_flashers.php As you can see, the color of the flasher is really only the outside edges but hey, sometimes it matters...
For lures, I fish 4 lures and thats about it. Coho Killer, Coyote Spoons (3.5 and 4 inch) Sonic Edge and Kingfishers. The trick here is to match the forage to the size of your lure. Bigger herring = 4 inch coyotes or sonic edges or bigger kingfishers. Smaller bait and I switch to coho killers or smaller kingfisher lite spoons. For colors, I'd choose green/glow, cop car, army truck, red racer, irish cream, cop car/green stripe, green spatterback, white lightning, and a few silver/green setups. Glow, silver, and UV setups all have their place...
http://www.silverhorde.com/id108.html
I don't run standard hootchies anymore, but anything green or green spatterback works. Folks also like the white/glow type hootchies and blue spatterback hootchies too. If I fish a hootchie I only run Ace Hi Flys. Same thing here, green spatterback, light green/yellowy spatterback, or blue spatterback. Green is just a great color for salmon in general if you couldn't tell already. Green glow for spoons and green spatterback for hootchies are my Go to lures that catch most of my fish. The main thing to remember with hootchies is that they DO NOT provide any action, so you need shorter leaders than spoons cause the whip from a flasher should give your hootchie some movement. Spoons don't need movement from flashers and lighter lb test is recommended on them so they have better action. Leaders are longer/lighter for spoons, heavier/thicker lb test for hootchies.
http://www.silverhorde.com/flys.html
A few plugs probably also need to be in your arsenal. I like anything thats green, pearl or silver. Something with glow or UV is helpful cause if I'm fishing plugs I'm usually fishing deep for kings... For plugs, go flasher-less....
I would also have a handful of different size hooks available. I like gamakatsu. Saltwater fishing does work on your gear so I always either sharpen or replace hooks often. I like open eye siwashes in 1/0, 2/0, 3/0 and 4/0. These are great for replacing hooks on spoons. 2/0 and 3/0 are the best two sizes probably. 4/0 replaces my plug hooks. I also like 2/0, 3/0, and 4/0 Octupus hooks for tying up my own hootchie leaders. I like adding glow beads between the two hooks too. Pick up a handful of spare hooks and a file, it'll save ya since you can keep your lures forever, just replace hooks ever so often to keep em sharp. At $2 for a 6 pack, its easy to have a few extra packs around to be safe. Having a handful of GOOD barrel swivels helps too. Pick up a handful of mooching leaders in the sizes you prefer to troll cutplugs...
Scent is always great to have on board. I like the little 1oz scent bottles of Smelly Jelly, that have the consistency of vaseline. Stays on for a while. Herring, Salmon feast or shrimp salt all work pretty good. Remember that putting this stuff over UV will mask the UV, so don't put it on the parts of your lures/flashers that have UV on them. It covers up the UV so it renders your lure useless of its UV properties...
http://www.tacklewarehouse.com/Smelly_J ... e-SJS.html
Couple great articles from Salmon University:
http://salmonuniversity.com/ol_12_rules ... shing.html
http://salmonuniversity.com/Downrigger_Tips.html
http://salmonuniversity.com/ol_Chinook_Rudnick.html
http://salmonuniversity.com/ol_fall_coho_Rudnick.html
That should help ya. If ya need anymore advice, feel free to ask or PM me. Always willing to help folks out...