Fly Fishing and RV Parks - Where in the Southwest?

I don't have a particular campground in mind, although I know there are tons in the area, but the Lower Salt River in Arizona is pretty cool to float a fly. I spent more time gawking at the scenery than actually fishing. We were visiting my in-laws in Apache Junction, which from what I can remember was about a 30-40 minute drive away. There were tons of campgrounds way closer and possibly some right there that I didn't notice or investigate.