Thanks to everyone for the tips. I will check out those Featherweights. Also, it sounds like an aluminum 99 would be a great idea - I've never seen one around here or online, though.
I've been looking at RVs, and they have such limited space! You would almost have to build your own RV insides in order to get any sewing space. You would probably have to do QAYG. I haven't actually lived or traveled in an RV, I'm guessing based on what I see in the RV world.