All I know is that I have seen float tubes there twice now. I have also seen canoes, kayaks, little racing kayaks and all sorts of small vessels. The tubers I saw were inside the 5mph bouys but then again the entire lake is 5mph from the shore to 100 yards out so it's not like you would miss out on anything if you were limited to that except maybe trying to cross the lake. I have yet to get bit in scow canyon although I have tried almost every time I've been there :)