I have the Furrion FOS48TA-BL. It is for backing and/or rear view. No problems with signal strength. No video lag. You wire the camera power into the middle rear running light and leave headlights on while driving. Best price is on Amazon.
I don't know about Jayco, but Starcraft includes the mounting bracket and pre-wires for this unit on their trailers.
2016 Starcraft Launch Ultralite 26 BHS W/ProSeries WDH
2013 Ford F-150 Supercrew 5.0L W/factory tow package