The Beaver tailwaters can be tricky. I have had some wonderful days there and also days when I had to stand in a carwash to get the skunk smell off of me. Before the population boom up there the fishing had been good then a combination of pressure and some highwater blowouts changed things. I understand they are trying to get it restored back to a good fishery. It is beautiful though and that helps when the fish are closed mouth. Did you go down stream past the big gravelbar?
Grandado