I have a bat wing on the roof, with a boost inside the coach. It kinda works, but not all that great. Also have a satellite on the roof that does nothing & nobody around here knows anything about it...
Add a Wingman to your batwing and buy a Winegard Sensar amp with signal Meter. It has a power signal peak function so you cam aim and maximize your signal.
At my house, went from about 20 channels to over 30. The amp is the best they have made.