As long as you don't need to pull it out of the coach to get to what ever needs attention serving and prime mover side of a gas generator is the same as a riding lawn mower. More than likely the motor is a Briggs & Stratton so there's a lot of information available concerning how to do the various maintenance items. And if you have to search out profession help the small engine techs at the local lawn mover repair shop might be a better choice than a distance RV service center.
And do remember, home made baked goods are always welcomed in the shop.