lifted trucks are at a disadvantage towing a trailer .
the additional leverage to the trailer hitch caused by the drop yoke is the physics lesson that explains the problem .
trailer sway is mitigated by increasing the percentage of tongue weight .
for myself the shortest trailer that works is the best answer .
a 21 footer has the same holding tanks , stove , refer, water heater , furnace , as the 30 footer .
the longer the trailer the less easy/expensive it is to solve the problems of tire reserve capacity and trailer sway .
i lowered the stock height of my duramax for better handling .
i replaced my 245/75r16e tires with highway LT265/75R16E michelins on 8 inch wide aluminum wheels instead of the 6.5" wide factory wheels.
handles way better, especially with a 10 foot high square box attached .