Hello Oldies & Newbies: We have been RVing since 1990. We purchased our 2006 Monteray July of 2015. It seams all the owners manuals mentions that the generator intake fuel is raised so that you will not run the coach completely out of fuel (good idea). While driving with the gen set on to power the A/C's we pulled into the camp ground to register, we both got out, when entering coach we both thought that the other one of us turn off the A/C's & gen, not so. When we hook up to power found out that the coolers started up. Come shower time, no hot water from the Aqua hot. The Aladdin showed 89 gallons used & 650 miles. You folks with a Monteray with 109 gallon fuel tank, that's about the limit. We had a 25 mile drive to home & full service. After fueling both the gen and Aqua hot started with no problem, A good lesson learned