The answer I found was a "Hensley Hitch", it stays on the trailer. They are expensive but used ones are available in the Classifieds of this forum and a full lifetime warranty can be purchased. They are an investment because Hensley swaps out brackets,etc. when you change trailers and trucks. The best is the way they tow, absolutely no sway and the trailer tracks like you are towing a fifth wheel.
Ken & Judy
2012 Prime Time Lacrosse 301RLS
2014 Ford F-150 Lariat - Max. Tow - Ecoboost
Hensley Arrow Hitch
Average 50-60 nights/yr