I have never dove a dry suit so I suspect a black water river is not the place to learn, so no thanks. I am sure the river warms up enough in the summer, anything above 65 or so is fine. Dark and snakes I can deal with but cold is just not fun to me and this is susposed to be fun. I would be happy to boat sit until the water warms up some, you need surface support anyway. I also would like to give White Lake a try, I understand that it might be a reasonable place to dive.