lightbar

Has anyone installed dual batteries in their dodge? Wanting to run a fridge and light bar from it. If so a few questions: - could you fit it under the hood or did you need to put it in the cargo area? - What type/make/accessories you used? - Difficulty of the installation? - Price?

Haven't had time to build my low profile roof rack yet. Really hoping too soon. But what's little that can be done next?