I have just launched this new online service and would LOVE your feedback and comments. http://www.boondockerswelcome.com facilitates driveway parking invitations between RVers.
Here, you can offer a free overnight spot to travelers or find one yourself on route to your next destination. You can search by location and even narrow your search by criteria such as RV length, whether pets are welcome, or generators permitted.
Less than 3 months old and already there are more than 300 free overnight host locations listed across North America. You can join even if you can't offer a boondocking spot yourself.
I've just joined FMCA but have been around the RV community both on and off line for many years. Find out more about me at my other web site:
http://www.frugal-rv-travel.com