I'm somewhat surprised at all those riding their high horses on this subject. If I had a decent offroad vehicle I'd try to help. I was once a clueless noob and someone had to come rescue me. I still feel I owe them bigtime.

Basic rules :
1) Don't wheel alone
2) Don't go wheeling at any location where you don't know the owner of the property.
It's awful tempting to break either or both of the above rules because there's not much local wheeling and sometimes you feel that you need a little mud on the tires. Heed Nancy Reagan, "Just say No!"