We sure get wrapped around semantics :)
It's my post and its TRIPLE TOW here :), the same as it has always been referred to for the 40 years I've been Rving, even back to my Grandpas Larson behind his TT Wilderness towed behind his 68 Ford Bronco, and the same way it comes up in several compilations of state laws available online in you google
Triple Tow!
For you truckers that like to call it double tow - feel free, the rest of the world understands what you mean :)