It really is a straightforward river to fish. Don't over complicate things, standard attractor dries (Sembob's Chubby Chernobyl is nice cause it'll float heavy droppers and is durable) but any thing will work, Wolfe's, Trude's, Stimi's all work, doesn't matter what color. Dry-dropper or two dries if they're rising. Para-adam's should be your go to mayfly (simple and imitates a ton of bugs), I doubt they'll key on caddis anymore, nor salmon fly's so go in between those bug sizes 8-10-12 ish for attaractors, 14-16 for mayfly's. Emergers and cripples can work well if you're fishing at camps where fish have been more heavily pounded, but again you don't need to match the hatch, there'll be tons of different may's and stones hatching throughout the river; you're covering 70 miles of water that changes character and temp and the bugs will change with it.
Terrestrials are always great, one of my favorite bugs on that river is a Tar-baby; black foam body, orange legs and white calf tail wing. Very simple, durable and they seam to love it. If you really want to watch a bobber anything with rubber legs and a san juan should have you covered. If streamers are your thing, it won't matter which, it's all about getting it infront of fish. Big and heavy work best because your oarsmen's probably not be going to back rowing much...
Yesterday's gone on down the river and you can't get it back. - Agustus McCrae