Good suggestions above. I would also suggest that on your next trip, once you arrive, hook up to water supply, fill your fresh water tank and then disconnect the fresh water supply. Use your water pump only. If you are at the RV, leave the water pump turned and then listen, does it run when no one is using any water? If so, then you have a leak somewhere. Even the pump doesn't run when water is not being used, you will at least know the maximum amount of fresh water that is available so if you run out, then you will know that people are using more than you think they are.