Do some inspection and diagnosis. Frozen pipes typically have a certain location where the pipes were exposed to the cold, allowing ice to form. Use accessory heat in that area and observe for dripping at fittings. It is rare to have multiple locations or a total frozen condition but is possible. Pray that your bath shower piping is still serviceable. It is a bear to restore the shower location plumbing.
Good luck on the plumbing. It was -29f at our house a couple of weeks ago. I haven't even checked the trailer as the plumbing is totally serviced (winterized). I do have to dig a walkway out to it and remove snow on the solar and check battery health. I know the batteries went into that cold fully charged but they are batteries and it was monstrously cold. All of my running fleet needed a jump start in that very cold condition. We are currently checking for land in AZ, lol.