I live 30 minutes from the Green. It will fish just fine for wade fishing at that time of year. The current "flood" will not hurt the fishing then. If anything, it will clean the river of silt and debris, and make things better. Plenty of wade fishing BELOW Little Hole, and further down into Browns Park. Floating is best, of course, but theres miles of good water and the trail below Little Hole is pretty easy. There are campsites on the road to the river, around Flaming Gorge Reservoir, and along the river itself within a couple of miles of the Little Hole parking lot.

You can fish hoppers/crickets/beetles/ants on top. Nymphing ALWAYS catches lots of fish. Hatches are sparse at that time.