Since the OP did not mention cost concerns and did mention "quiet", I would agree with the recommendations for the very large Honda or Yamaha. Be aware these are big, heavy and costly, and "quiet" is a relative term.
My "suggestion" would be that the OP catagorize his power needs for the RV versus a power outage at the home. With this in mind I think two generators would actually serve better. For example, a 3k inverter gennie for the RV, and a Champion 3500 for home backup. This would give greater reliability for home backup and both gennies would stream a combined 5000-6000 watts.
Added benefits are easier portability, more flexibility in setup, and reliability through redundancy. I have a Powerhouse 2700 inverter gennie that goes with the TT, and a Champion 3500 that stays at the house faithfully awaiting the next call for home backup.