We are all assuming your BATWING antenna has the ANTENNA WALL PLATE that sends up 12VDC to operate the BATWING built-in pre-amplifier... This will be indicated by a small led light that comes on at the WINEGARD ANTENNA WALL PLATE.
The 2007 Model trailer may be using the older style BATWING. This will work but would work much better if it has the dipoles added.
Your BATWING should look like this one with the ADDED UHF dipoles.
NOTE THE ADDED DIPOLES
Of course you will also have to use the digital TV menu and select ANTENNA MODE and scan in the digital TV station after you point the antenna is the right direction of the the local town transmitting them...
This is a typical setup for using these items...
We get excellent HDTV digital TV reception using our BATWING OTA setup just about everywhere we go to here in the US...
Roy Ken