Like the OP I traveled I-81 frequently. My Equalizer hitch was OK in most conditions but the trucks and curves of I-81 led me to find a better hitch.
I came across a Hensley rep.at the Hershey RV show and the rest is history.
I towed my 10K loaded TT with a Ford Excursion for years without issue.
It is often mentioned how much better a 5'er tows vs. a TT. However now that I own a 5'er I don't necessarily agree with that opinion.
My 5'er tows great and is very stable. But my HA TT combo was equally as stable as well.
A fiver tows better than a TT combo using a friction based hitch, however I don't notice much of a difference between my current 5'er and my prior HA combo.
I strongly recommend the HA or PP for those looking for a superior towing performance.
