Depends on the bands, but I can tell you what will work, and that's a decent vertical. A 4,5, or 6 BTV will work great if the body is made of aluminum. The only thing you'll have to fashion is a hinge, and some way to hold the top down when it is folder over. The best place to put is, is as close to the ladder as you can (hopefully yours has a ladder. Just don't mount it on the ladder,as it's about the worse place in terms of ground loss.
Alan, KØBG
www.k0bg.com