Do you need a generator?
Well, by the standards I use: YES, everyone does, But here is the logic:
Do you always park in a licensed RV park or other facility/location which can provide proper power to your RV (NOTE: many "30 amp outlets" in a friend's garage... NOT for RV use (240 volt).
Does the park where you are have 100% reliable commercial power (NO no place in the US with the possible exception of Page, AZ has 100% reliable power.. page has a Hydroelectric dam, a Coal fired plant, and a row of big Diesels, they are not likely to go dark, but that's the only city I've seen so well protected).
DO you have a Sticks & Bricks house? (IF no stop here)
Does it have 100% reliable utility provided power? If not install a proper INLET on the house, run it to a proper GENERATOR panel, put only 120 volt circuits (and not all of 'em) on that panel (Circuits you SHOULD transfer include, Fridge, Freezer, Microwave, Furnace, and selected lighing, DO NOT transfer Cloths dryer, Washer, ALL LIGHTS, Stove, Central AIR (Window airs can transfer). anything needing 240 volts).
WHEN (not if) Commercial power fails, Turn on one of the lights NOT transfered (in my case it was a never (otherwise) used hall light) fire up ye old RV, (Which by the way has a 30 amp outlet in the basement) plug the house into the RV with a special made cord, and flip switches
Click Radio/TV, Computers/Internet modem
You get the idea
Generator transfer switch $$$
Installing it $$$
Otlet on RV $ (I have the skills to do that, it's a 30 amp breaker off the main breaker box in the RV by the way).
Warm Wife (See "Click: HEAT" above) PRICELESS.
Home is where I park it!