Very nice! We carry our bikes in the camper/topper, but on each side of the bed. Your arrangement might actually free up some space. I'm gonna check in the A.M.
Now, lock them with a cable of sorts!! We happened to return to our truck as some feller was trying to get inside--they weren't cabled down. Also, we try to cover everything in the back of the camper with a black plastic cover. The windows are tinted dark and if a thug is quickly checking stuff out, he might not see much.
Again -- good job.