The conventional wisdom in Northern Ca where I live and fish is that float tubes are only for lakes and ponds. However, in northern Georgia they use float tubes extensively on the Chattahoochie River (aka Hooch). Its a tailwater below a power generating dam. I'd like to hear about experience with a float tube on a river, and how to make it safe. Are there any characteristics of the Hooch that make tubes OK e.g. slow, deep water? How slow does it have to be to kick going upstream?

Thanks for your thoughts.