My boss is an electrical engineer, if you actually look at his degree, even though he hasn't worked in one in a very long time. He's volunteered to help me with the camper (actually, he said he would do it, because he was afraid of me setting myself, the camper, or something else on fire and/or electrocuting myself, and then he would have to do the weekly maintenance on our servers himself.) Anyway, so theoretically, I probably don't NEED to learn how all this works - but I might need to repair it, and I feel like I really OUGHT to know.
Some links I've found useful:
http://www.marxrv.com/12volt/12volt.htm
http://mikenchell.com/forums/viewtopic.php?t=37732
More on my plans for the actual system tomorrow.

My little brother finished grad school earlier this month and is temporarily back here in Dallas while he hunts for a new job. He's going to help me with some of the manual labor of getting the camper re-built on the inside. Hopefully I'll have some real progress photos soon.