In SoCal, just make sure you have a spark arrestor, the rest of the stuff the rangers really don't care about.
Most are using a Garmin GPS. I have the Southwest USA card in one of mine, the other has the big set of USA maps in it.
Yes, there will be camping trips that you'll want your GL bag for. If you can't find one, plan one and post it up.
Check Craigslist for cheap vehicles. Towing stuff in California is a pain in the ass, as you can't use the carpool lane and have to keep to the rightmost lane at 55mph.