Fletch is bang on with charging advice, redarc stuff is really nice and safe but criminally expensive, keep an eye out for second hand stuff if you're not in a hurry.
Run those panels in parallel, you'll want all the power you can get.
I'd run a 24v winch from the main batteries and run a lithium house, have you got winch already? Unless you find a cheap PTO, that would be super sweet.