bkenobi wrote:
A wiring question... the batteries are wired independently to the panel (I believe). There's a bunch of leads with some connected to each battery. I get a little nervous every time I remove the batteries that I'll mess up what goes on each terminal. It seems though that so long as I have + leads to the + terminal and - to the -, it shouldn't matter how it was originally wired.  Correct? In other words, could I move all connections to the outboard battery and just the hookup leads to the inboard? Obviously it would have to physically fit, but + is + and - is -...what difference does it make?
Doesn't sound correct. I would run each battery to a common buss bars using equal length conductors. Then go from there to each device i.e.: camper 12v distribution panel, charge controller(s), inverter (if used) With two batteries in parallel you want the 2 batteries to become 1 larger 12v battery bank with draw being equal between them and not be charging/drawing different loads from each. 
It sounds like a you might benefit from someone more familiar with wiring to help clean up your system.