My all time favorite is the Deschutes River in Oregon, Beavertail to the mouth. Two day/one night float. August to October for summer run steelies. River levels are always steady so no worries about high or muddy waters. I like fall the best as all the rafters are gone by then. Requires a shuttle driver but you can hire them from the Oasis. Haven't done it in 15 years, but it used to be an annual event for me. It still brings back my fondest WA or OR river memories.