I towed an Outback 25RSS with a Dodge Durango Hemi, was slow but OK. It is not a twisty road, pretty straight and short, maybe 1/4 mile. Not sure of the distance, but it really is a 25% grade. Old school bus with us did have to stop once and cool off.
Getting up to the campground wasn't bad for us. It's the perimeter circle around the campground that is in dire need of repair. Half way around we scraped rather badly. The park really needs some road maintenance. Getting down was not so much fun, but at least it's a short ride down. We used to live near there.. I'd definitely go to unicoi instead.
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