My wife and I can go 5 days on our single group 24 battery. That being said we don't watch TV, listen to music quietly and not very often..
Consider upgrading lights to LED. Perhaps get a portable solar charger (we have a 100watt suitcase).
A lot of people out here run open frame generators during the day, in some of our more spacious campgrounds it's not a problem.. however most of the time it's annoying. Don't be one of those people, get an inverter generator if you really need one and I'd suggest making sure it's bit enough to handle your A/C if you have that.