Summer camping should not consume much battery power - just lights, water pump and fridge controls. With LED lights we get three days on two 12 V batteries, then take a drive for an hour or two and they charge up to at least 70% again. The only problem is the temptation to run down the batteries below 50% charge, which shortens their lifetime. If it gets cold and we run the furnace in the evening, we have to take a drive every day.
Recommend you try it without a generator unless you watch a lot of TV while camping. Enjoy the quiet and lack of fumes/carbon monoxide. If you must have more power then get a generator. You and your neighbours will appreciate you spending extra for the quieter Honda.