Air Campers

There is a new group of campers out there known as Air Campers. They've put up a website dedicated to helping camping aviators find airports where they can camp on field. 

There is a fee to join and take full advantage of all their website has to offer (I believe it is $49).  I have not joined (and I am not a sponsor -- either paid or otherwise) so I don't know what is behind the curtain when you do join.  However you don't have to be a member to see a map of which airports accept campers (615 at last count).  If any of you has used joined the club and used the service let me know how it is working out for you.