Check out Keith's fantastic boat blind. I love the clamp solution for mounting the frame!

Here are some photos of the frame for a boat blind. It has 4 doors for entry front side & rear. It has movable flaps on top and raised top flaps for two hunters. It attaches with clamps - no holes drilled in the boat. Up next is a dog ladder and covering the frame with rubber sheeting and brushing mesh. Maker Pipe made this project a lot of fun.