There will be silvers and pinks in the streams during your trip. IMO a 7 wt. will be fine. If you are looking to do steelhead in your neck of the woods with the same rod then maybe bump it up to an 8 wt, but that will be too much rod for most of the fish you will encounter on POW.Dug out my old fly reel last night, cleaned it and re-lubed it. Need a new rod as the old one had a fatal collision with a truck door. Then kids happened and I just never got out again.
I've never done salmon or steeelhead with a fly. Is a four piece #7 too light?