Always check the pressure of any new campground you are hooking up to making sure it will not exceed the limits of your lines and connections. Some newer rigs have more residential style lines that can handle the higher psi and provide more pressure. Using a pressure regulator will protect your rig from an accidental flood. Most campground water is also hard water which will contain lime, rust, and calcium all of which will clog lines, screens in the water pump, and ice makers. A good filter is well worth the money.
Fresh Water Sustem Session 4: Checking Pressure, Adding Filter and Pressure Regulator