Kyfarmer, make your sbb's, and staple the screen. However, make it in such a way that you can use a removable sticky board, and removable piece of plywood for a winter bottom board if you so desire in the future. It is easier to build it that way, and not use the removable solid bottom feature, than it is to want to slide a piece of thin plywood in, closing the bottom, and not being able to. At any rate, you'll want to be able to slide a sticky board in to check mite fall.
Regards,
Steven