Star Performance Kingpin Adapter (Gooseneck) adapter - includes a glider motion that works very well. (SPHitch.com)
Pros- you raise and lower the trailer on the ball, no ramming motion or necessity usually to even chock wheels. "Cannot" drop trailer on your truck bed.
Cons: hookup likely slower due to jacks working slowly, may need safety chains. Might introduce greater stresses. Current campground neighbor has the same RV as me, only one year older and uses the Colibert adapter.
Don't recommend the Lippert/Reese Goosebox. Requires every trip coupler greasing and likely airbag filling. Did not protect my RV from a horrific TX pothole that led to front frame member cracking and subsequent failure earlier this year (after towing since 07 with an adapter). That was fixed and I'm using the Star Performance adapter again.