LP gen has served us well for our minimal needs - 5 to 10 hours a month on a typical trip.
We use it in really hot places to turn on AC and cool off fast (doesn't take long with a smaller rig) while stopped for lunch. We do camp without electric hookups now and then, and the gen is great for AC, microwave, and running the outlets for coffee-making, charging up cell phones, etc.
We've got the propane tank on board anyway for the three-way fridge, stove, furnace (and as an option for heating water when not on 110.) And we have never had any problems getting it refilled in all our US and Canada travels (an argument you sometimes hear.)
Off topic, but one good thing about downsizing, is that you'll often find good smaller campsite availability with 30 amp in some highly scenic and low cost public campgrounds. If/when you have the senior pass, at half price.