I've camped at Leadville several times and no problems. I'd be more concerned if I stayed there a long time. For long stays I'd check the flame color and for sooting. Outdoor gas appliances like grills and turkey cookers go by different rules but I'd watch the WH, furnace, frig and anything else that has a limited space heat exchanger cuz they are more susceptible to soot clogging. When an exchanger gets clogged enough, raw gas rolls out and that's when fires start around the burner area. Appliances with a draft diverter have to be checked for proper drafting. The gas inherently derates itself (BTU content) as it goes up in alt. but not as fast as required for the correct air/fuel ratio, proper drafting and for complete combustion so the orifice size has to be reduced at some point. That's gas appliances 101 and that only scratches the surface! Craig