Backup Camera on Travel Trailer

If you want a clear image, go with a wired camera system. I did mine for about $60 buying the various components (monitor, cables, camera) online. It would also allow you to see behind you while traveling if you wish.

I tried several wireless systems and although they are sometimes easier to install, they all are susceptible to interference from Bluetooth devices, other wireless devices in the area, and wireless signal degrades rapidly with distance and obstructions in your trailer.