Welcome to the Forum.
Just a note: make sure that your 'wireless' set up will even work that far (rear of trailer to cab of tow vehicle). The one I ordered just didn't cut it that far and through all the metal, glass and fiberglass. The signal was weak and the image on the monitor was really poor or non-existent.
I scrapped the whole project.
Anyway, good luck with it. Hope you have better luck than I did.
"If we couldn't laugh we would all go insane."
Arctic Fox 25Y
GMC Duramax
Blue Ox SwayPro