I have a Curt bumper mount receiver for our bike rack. It works ok for local trips, but the bikes tend to bounce. This is related to the twisting of the bumper, which will eventually cause the welds to fail at the frame. I inspect mine on every trip.
So unless you get a "real" hitch weded to the frame (not bumper), you'll need to find another solution, long term.
I do like the convenience of the bumper mount, though.
2013 Winnebago 2301BH-Red
2012 Ram 2500 Megacab HO CTD