Re: I too am going to montana and jackson hole.
With the warm temps all the snow will be melting, causing the water color to trun to dirt or mud. It is very difficult to fish muddy water. And the water level will be extra high because of all the snow melt. Tailwaters are rivers that flow right out of the bottom of a reservior, and they do not freeze, b/c the water coming out of the bottom the res is much warmer than suface water. Im guessing you will have to fish tailwaters to find clear, wadable water. I hope this helps, let me know if you have any other question.