We have an Entegra Vision 2019. We cannot do any dry camping for over 2 hours without our refrigerator going out and then 2 hours later we lose power throughout the coach. Dealer says the battery tests fine but not meant for long term dry camping. I don't consider staying over night in a rest area dry camping ! We keep getting the run around from Lazy Days and from Jayco. So much for buying new so you have no problems.
I dont know the specifics of your model. You may be drawing more amps than you think. Can you see what your drawing? You may have to shut off breakers to eliminate some unneeded amp draw to make the batteries last longer.