In the menu, there is a "Delay ON or OFF".
I have mine set for delay ON. It will stay on for about 5 - 8 seconds after I put it in Drive. I'm not sure if it shuts off after a certain period of time or if it is depending on the speed.
Give this a try for now and see if it is enough time. I like to see everything when I first pull away after connecting the trailer as well.
HAPPY CAMPING!! :D
Daryl and Sandy
2013 Eagle 314BDS
2012 Ford F150 Platinum, 4 x 4 Crew Cab with Ecoboost