I too hunt out of a saddle. I think of hunting this style like backcountry skiing. Layers. My outer layer is a thin camo waterproof shell. I have a wicking layer, fleece, and a down parka for when it gets cold. I usually walk in and climb with just a wicking layer and/or light fleece. Once up in the tree, I put the rest of my layers on. The other nice thing about this system is that it is fairly inexpensive.