Fire Instructor,
I bet the diamond plate box looks great! Please post some pics; would like to see it.
We don't dry camp much, maybe once every couple of years, so 2 12v batteries works just fine for us but I can see where 4 6v batteries would be the cat's meow! How long can you stay boondocked with that arrangement?
Pete
__________________
2013 Forest River Surveyor SP220 Sport 25'
2012 Ram 1500 4X4, 5.7L Hemi quad cab