I bought one of those fancy water pressure regulators and was just going to install it at the spigot each time but decided to put it in the camper permanent like. Here's some pics:
I put that stainless steel hose in there so I was protected inside the trailer. My supply hose to the spigot will not be protected, but if it bursts, it just makes mud.
Comments are welcome.
Here's where I got the regulator: