It really depends on your camping style and energy requirements. With minimal electric use refer, water pump, a few lights and 2 6 volt GC batteries you should last a week before your batteries are at 50% SOC I doubt your water will last that long. You can then charge them fully when you get home. A cheaper solution is to get a 40 amp portable charger to charge your batteries if you watch TV, use the internet etc.(have higher electrical requirements) and use your 6300 to top charge your batteries after the portable says full and use as a converter when plugged in. Your 6300 will only charge at about 5 amps and is more of a maintainer than a charger. Your genset is more than adequate. Check the output of your 6300, what is the voltage output reading when plugged in?