Spent three days last year over 4th of July with my wife and her parents floating down the Colorado in Glen Canyon. Very beautiful. We tried our hands at fly fishing, but the trout were too warry. Saw palid toads, rainbow trouts, and red, fuzzy ants, along with blue herons and red-tailed hawks. Quite a colorful journey. Reached the petroglyphs on the afternoon of the second day.