Thanks so much, these are some great ideas.
Three ladies at the September quilt retreat had the Cheryl Ann design wall 72" x72". Comes in a nice bag, is easy to put up with tent poles, has a nice flannel surface. On Ebay right now for $98.99 and free shipping. I think I'll finally break down and buy one. By the time I purchase everything I need to build my own, I will spend at least half of that $$, and it wouldn't be near as portable.