I can't speak for the new Ranger's electrical capacity yet, my truck only has 800 miles on it and I haven't delved into alternate batteries, etc. yet and I am just starting my build. I CAN tell you that my '07 4Runner, which I overland in, has matched dual AGM batteries and a smart solenoid to handle the charging functions as well as other items. This gives me the ability to camp for days at a time, run my camp lights, and my camp fridge and still have a fresh battery to power the vehicle when it's time to move on. If you want to stay longer without running the main engine you could also install solar panels to charge the house battery, or even run a small camp generator. Isolating batteries is a must, in my opinion. I have my winch and off road lights connected to the main truck battery because I always have the engine running when using those accessories. My communications and other camp related items, as I said, are hooked to the 'house' battery. The system has never failed me. There is a lot of info on this subject in the overlanding forums. Good luck in overlanding, I think you will enjoy it immensely.