The more you camp and learn conserve tricks, you'll get better and last longer between charges and water fill.
We have one G-24 Marine battery, 30 gal fresh plus 6 gal hot, 18 gal black and 19 gal grey water. Duel propane tanks. Lights are all LED. Wife and I can go easily ten days on it. Navy showers alternate days, and care on water use for cooking and washing dishes. We do not feel pressured at all. Course, our kids are gone, and we camp in TC, so just two of us. As you 'practice, and teach your kids', you'll get better and better at it until you work out all the wrinkles. Enjoy !!! :)
