I always check the water pressure at the hydrant with my trusty Home Depot water pressure gauge before hooking up. City water at my home is 60 psi haven't found a campground over 45 psi. I take several readings at different times if it remains 45 or under I don't use a regulator. I am still new to camping and after set up I walk the area to see what people are using, I see very few pressure regulators and surge protectors being used. Just a noisy observation.
Chuck " still in Va "
2012 3065w Windjammer
2012 f250 lariat Crew cab power stroke (of course )