We towed our 2720SD over 3000 miles last year through high winds, mountains and freeways surrounded by semis. There was no sway. Given that we were towing with a jeep liberty which has a short wheel base you should have no problem at all with your truck.
We do not carry anything on the rear of the trailmanor but we do have two 6v batteries in the rear battery compartment (+50 lbs over 1 12 volt).
Peter
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