Montana Front Living question...does the bumper hit often

@40' long and the axles towards the center that leaves a big section from the axles to the bumper. If the 5er is a couple inches high in the front that will compound the issue.
FWIW I have a 31' TT with the axles more towards the center vs rear. Just exiting my driveway one of my stab jacks almost drags. I'm running 16" tires and a robust suspension and my driveway's not steep at all.
My thinking is the guys pin high vs level and thats causing the rear bumper to drag more often.