Tread Lightly! says that by respecting the land, water resources, wildlife and rights of others, will help ensure that you be able to continue to go four wheeling, and that others will be able to enjoy the outdoors as well. I agree 100% with that statement and hope you take it to hart. Remember to drive only where permitted; stay on the trail or road; don't make your own short cuts, switchbacks or trails.
Having said that, I have a few areas where I frequently ride. Places where four wheeling is permitted.