The instructions with my Superglide were that you had to be within 12 degrees of straight ahead in order to hook or unhook because of the capture plate. There were quite a few times I could not get the hitch to release without first raising the trailer a little like everyone else has described then chocking the trailer wheels, putting truck in reverse until there was tension on the hitch, set the parking brake and get out and release the hitch then putting the truck in neutral and letting everything relax. Yes it was a PITA. I no longer own a 5th wheel but used the Superglide for 8 years.