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SILVER Star
I'm not concerned about draining both batteries. The marine battery will last a long time with only the fridge drawing off of it. And I have solar that I just need to mount my roof rack and will have that added bonus. I suppose I could add an isolator for added insurance...
Where did you run your 2ga wires? I was thinking of running them along the radiator (in front of them) but that seems to be pretty hot. But I guess it's only about 180-190 degrees so should be fine.
I didn't realize you had a marine and a traditional.. I'd definitely run an isolator. Also in that case I don't know that 2GA is necessary.. I think most isolators allow you to do your starting off the regular battery only. In that case the bulk of what would be getting used from the marine (house) battery is your accessories and they don't need nearly as big of a wire gauge.
My wires are run in front of the radiator. I grabbed some spare corrugated plastic conduit from one of the spare floor harnesses I have lying around (original non-locked 94, locked 97 I got with the axles, non-locked 97 I got with the body shell). Removed the short core-support section that unbolts with 12mm heads (plus hood latch, horn, a/c condensor bracket bolts, upper inner headlight bolts, etc).. and wrapped/attached the 2awg to the bottom of the front clip harness where it goes across. There are three clips there already holding said core-support harness up to the sheet metal.. I just used fabric harness tape and zip ties to attach. Also put a bit of extra fabric tape on the 2awg stuff where it dropped into the triangle between the outer core support and the radiator brackets.. in case of chafing.
Will try to get a pic tomorrow.. but my memory sucks.