There is no ban on felt soles. Depending on what part of Idaho you are in will depend on the fishing and where you will be fishing at. As far as clothing dress warm and plan for hot weather. Here is a clasic example. Went fishing a few days ago. started the day with shorts and t's. About noon put on long pants. by 2 pm was in my carhearts (spelling is not right). We have spring summer fall and winter all in one day. The rivers are all blown out bad this year. Let me know where you are going and I will try to find a few fishing spots.