I saw @Jeff leave a Chicago meetup with twelve or fifteen Kettles wheeled inside of a trailer it seemed could fit a car.....he had the lids on the Kettles with nothing tied down...not the lids or the Kettles. He said he had gotten there like that and would be sure and drive safe. You ever see shots of Jeff's collection......balls of steel I say.
Only pictures of it but there is no F#(K1N way I would try to pull that off with any
one of his kettles, let alone a number of them. Damn.
I'm going to do a combo of the ideas above. I picked up some foam tubing today for the rims, then will stack them like Neil and the guys said. They'll be back in my cook trailer and hopefully they'll stay put.