Cadbury Creme Egg said "Your pipes are probably frozen underneath your trailer, you will probably need the plumber to put more heat tape on them after they thaw them out. It’s going to be an expensive touch, but it is your responsibility, not the park owners "
That is probably what is going on. The only way I can see multiple people with frozen underground lines if they are all together. If it is the person 3 doors down or another row over with frozen pipes and not directly in a row next to each other then yea line to trailer. If in a group then I can see a frozen line. I had my tape go just before I was going to replace it. $500 bill for 45 feet of heat tape I paid last year when it was these temps.