I don't have plans or know of them but if you hunt on the web for Barnegat Bay sneak box plans you should find some. They were originally I think strip built and are designed for water fowl hunting. Early ones were sail powered later ones paddle or outboard.

Sneak box boats have the maximum width nearly at the water so are very stable for their width, ideal for using a shot gun in a boat. Often this hunting is done in the late autumn so the water is getting cold, not a good time to go swimming.

Bill H.