ya pretty much what everyones said, make it all solid all the way around then get some sort plexiglass/strong wood/covering mice cant get though and just put a rock on top while your not using it, a little crude but effective. moth balls would be a nice touchif you dont end up covering it, make sure you get a video of it because it would be jokes to see you kang flip in a nd a squirrel just like jumps out and bites you haha