Being retired military we have used numerous military campgrounds around the country. There are also some VFW posts like the one in Yuma that have RV parking sites. And also mentioned, American Legion posts sometimes have RV parking sites such as post 137 in Jacksonville, FL. I've never run across any VA RV parking and I'm also a card carrying service connected disabled vet.
Here is a reference to some of the military campgrounds we have stayed at..
Click Here!FastEagle