I researched and read lots of ideas for a bike rack on our pop up and came up with a solution that fit my requirements. We already had a hitch bike rack and I wanted to utilize it with the trailer. I found an 18 inch receiver tube at harbor freight for $16 and talked to my welder buddy that works at a shipyard. He welded it up for me this weekend and it's going to work great for us. It's plenty strong for a bike rack or even a hitch cargo rack if I decide later on for even more storage. He was able to source a 60 inch scrap piece of 2 inch square tubing for me and I gave him a six pack for his time. We tucked the square tubing up behind my bumper nicely and welded it to the frame. Then the receiver tube was welded to the square tube and then to a cross member on the frame. Turned out great and the bikes are going to fit perfectly back there.