Rear Exterior Shower Connectors Leaking

[MikePapa]

While winter camping for a couple months in Colorado, my exterior rear shower connectors are freezing & leaking. I expect freezing weather every so often & am using all the techniques to prevent freezing pipes, but I can’t seem to prevent this shower from freezing which is causing the connectors to expand & leak. Last time I partially removed the underside & was able to hand tighten the connections on the back of shower once above freezing. Leaking again after another round of low temps & wish there was a valve to prevent water from going to the shower for these circumstances. I use a heated light under Rv to help prevent fresh tank freezing along with continuous running of furnace. Skirting is not allowed. Being so far on the rear of Rv, it’s hard to get heat there. Any ideas? Different connections or plumbing thread on connections or potential valve somewhere I don’t know about? 2020 Montana High Country 385BR