Only thing I thought of would be to put two additional bars starting from the center of the backside of the bumper and going to the frame rails.
Then if you need to get pulled out the bumper will not bow out.
Cliffs notes: traingulate from the rear of the hitch mount to the frame rails.
I had this happen on a Toyota when I got pulled out from the bumper mounted hitch, it bowed bad enough to bend the ends in enough to dent the quarters.
Bad computer skillz, but you get the idea.