i recently duckied the verde river below camp verde. it doesnt take too much water. i think we were there at like 220cfs.
really pretty river. it's a forest service wild and scenic. it has a couple class 4's so i was told. nothing too big, just really tight at that level... unless you run verde falls, which looked like a serious thrashing for a ducky at 200cfs, but the portage was easy.
we did it as a multi-day but you might be able to run it in a day if you really haul ass.
spectacular river, but a little more water would always be nice