Dave -
You are quite right for the towing you do. Florida to Missouri is basically flat terrain. Most of the comments are directed at folks who plan to tow in high mountains with steep grades. Although the tow vehicle manufacturers never mention it, the requirement placed on the tow vehicle for these two situations is quite different. This makes sense, I think you will agree - it is harder to pull a trailer up a steep hill for hours than it is to cruise along a flat turnpike for hours. That was the basic intent of J-2807 - to prevent manufacturers from cherry-picking their tow conditions when stating a rating.
Bill
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