I don't have a generator, but people on other forums who do say to NOT go with propane unless you have very large bottles. Reason, if using extensively (as in boondocking) you will run through a 30# bottle in a day during times when you use your furnace also. They go on to state that during summertime with A/C the same size same bottle will last only a couple of days and then you have to refill it. That is just what I have heard and my 2cents. If I were buying a generator, I would most likely go with gas model.