Re: Montana in July
You choice of gear sounds fine to me.
I haven't fished the Bitteroot, but I've fished the Lochsa a couple of times and spent a week backpacking on the Selway. I found the fishing very good and not very challenging. Standard attractor patterns and small leeches on the Lochsa worked well. Had very high catch rates on the Selway with the Chernobyl Ant and/or hoppers, but I can't remember if it was July or August when we were there. Anyhow, I wouldn't get too stressed about it - it won't be rocket-science fishing.
And I hope you have a great trip.