I deffinitely think dual batteries is a good thing for us. Kinda the same thing on our boats, we would fish through the night so we would have TONS of lights on, radios, GPS, Radar, TV, Fans, etc...the alternator on most outboard motors is nothing more than a trickle charge, so we would actually have two batteries for each motor and another battery for accessories, some boats of ours would have 9-12 batteries. The other good thing about it is the ability to use them as a make shift welder if need be. The only downside, IMO, is the added weight, but for a trail rig hat should not be an issue. My buggy will have dual batteries once its finally running good.