Actually, if you make it 8 foot wide, you would get a middle height of about 6 feet, and you could cover both ends using 3 sheets of plywood, one whole on the bottom, and splitting it lengthwise to cover the top 2 feet in both ends. If you frame in a door, you might even manage with one sheet per end, if you use the part for the door as the top, and make a netted door. Hmm, interesting ideas.