Thanks for the suggestions - I'll do some checking. I like the thought of cheap trays from home depot. I tried their website and didn't see anything - I'll have to stop by the store to see what they have.
Jim and Hugo - Either of you up for another trip to Joshua Tree??? Could be a warm up (literally) for the dunes.
Dan, that sounds like a plan. I have to get my youngest home from college next week but we should consider it. I would love to see the holders and talk about bellows construction. Still on the fence about making/buying!!??