Here is my hitch setup. The shop replaced the tubes that were holding the bumper then welded the 2" receiver tubes to the new framework. I have used the Thule bike rack for years - it is a pricey but very well built unit. The bikes are very secure and mount in just a few seconds.
Love that set-up. Can you tell me name and number of the bike carrier and why the two receivers? Only one is needed for the bike rack, right?
If your Chapperal has a spare tire on the back bumper like mine does, you can by a rack that attaches to the spare tire. The other way I would suggest if you don't have the tire is to just go to Walmart and purchse the 2" reciever hitch that bolts onto your 4" square bumper tubing and then buy a rack for the receiver hitch. No need to weld a receiver hitch to the bumper it all you are carrying is some bikes or a small cargo rack.