We also use a Watts regulator as a portable. I have a section of hose with adaptors that go into the Watts which is followed by a pressure gage. We camp about 180 nights a year and have used it for five years. We keep it set on 50 pounds. Yes some campgrounds especially in the San Antonio area can have as much as 160 pounds pressure. You will find many campgrounds in your travels that never get over 40 pounds like Virginia Beach in peak season. If the pressure gets to low you can fill your fresh water tank in the campground and then run your pump which will provide good pressure. The Watts has been a good choice for us.