I've been up over 11,000ft and my propane appliances (water heater, furnace, stove) worked fine. Make sure to blow compressed air into the burner tubes to clear any junk out of there.
2014 Micro Lite 19fd
2015 F-150 5.0L V8 XLT Crew Cab, 4x4, Tow Package, 36 gal tank, 3.55 locker, 1891 payload, Integrated Brake Controller, Roadmaster Active Suspension
Wooden Spoon Survivor