I'm new to the RV life. This is my first unit and I'm living in it. I've thought about the same thing that you are talking about. I spoke with a gentleman that is now using a Class A motorhome. He told me that he had mounted a reciever hitch to his 5th Wheel Trailer and had one of those platforms like they use for luggage/etc on it and a generator set up on that for when he drycamped or lost electrical power. Not sure, but sounds like a good idea to me. Plan to do some camping in some areas without hookups. I'm trying to find me a generator that I can pick up and mount on the back of this trailer.
Personally, I don't think mounting a generator in one of the storage compartments would be too good. I'd be a little concerned about the noise and the possiblillity of exhaust fumes possibly coming into the trailer. I'm think if that generator is on a carrier, that it could be removed and put a few yards away from the trailer.
i mounted a yamaha 3000 is in the, extended the exhasut out under the floor. I leave the compartment door open - i secured it with a steel cable and lock -- i got the remote model so i dont have to get up at nite to turn it on and off