Rick, if you wanted a vise along, I don't think you could find a more simpler, effective one.
What kinda situation do you foresee the need of one. In all my RVing, I can't think of a single time I wished I had one, though if I did..........
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2017 Escape 5.0 TA
2015 Ford F150 Lariat 3.5L EcoBoost
2009 Escape 19 (previous)
“Most folks are about as happy as they make up their minds to be.” — Abraham Lincoln
I am more of a backcountry person so picnic tables aren't that common where I go. I'll be using it for minor projects like fixing my camp chair or getting a stuck nut off a bolt, etc. Nothing major.
I thought about buying a small vise, mounting it to small piece of 2x6 and then C-clamping it to the bumper of the Escape or to a setup on a hitch similar to the Trail D vise.