The best systems are made in Michigan (Davidson), google Hensley Hitch, expensive but is the best system you will not need to control sway there will be none and you can drive totally relaxed with one hand even when trucks are passing or being passed. We have had ours for many years and moved it from trailer to trailer when we replaced them.
"Well that didn't go as expected"
2015 Chev 2500HD Highcountry Duramax
Cedar Creek Silverback 33IK
Donald&Casey cairn terrier
Rest in Peace Mary my darling wife.
Scottish by birth Canadian by time.