I have been praying, especially this weekend as the date for leaving got closer (we leave Wednesday morning), that God would show me what we're supposed to do for our floor! when I was wandering around Lowe's today I met a couple who have lived off grid for a very long time and told me the best floor they could recommend is a tamped earth floor
http://www.grisb.org/publications/pub11.htm
We're going to use dirt from the property, tamp it down until it doesn't shake around, and then cover with canvas
I bought canvas and am going to sew it together and I have seen shows about painting carpets and flooring onto canvas so I'm going to look into doing that when I arrange the tent
I'm very excited--it will be a lot of work, but we can do it