I built some screened bottom boards with NO exit to transport mine - basicaly the exact same design as a telescoping cover, but instead of plywood and sheet metal I used METAL (not fiberglass) window screen with well stapled and taped edges. bungee strapped the hives closed for the trip - when I got home I simply removed the bottom screen and placed the hive on the bottom board in place. Probably a little paranoid, but I figure you should never underestimate the panic factor inherent in us when one bee is loose in the car, much less 10,000. :-D