"Instead of a national flying site ... why not help local clubs buy a plot of land so that we can fly at a site without fear of losing the field to environmentals ... flying site are harder to locate and establish and the fields that do exist are always indanger it seems ... some clubs are more expensive than others to join ... "

Excellent idea! It's already in place! The Flying Site Assitance program is there on the website, and will cosign on loans for clubs that meet the right criteria.
There has been talk bandied about for some years about getting some more National flying sites, but I would guess that what with the current economic and insurance environment, those kind of ambitious ideas must have been put on the back burner for the moment...
Ever been to Muncie? It's great, worth the trip. It's nice to know that if the worst-case scenarios come to pass, we will always have at least ONE place to fly!