Originally Posted by dallasdb
I've read if you do drive on the ice you should move your vehicle every 2 hours so the heat doesn't create weak spots in the ice.
That statement might be a good safety tip for early or thin ice, but I don't think that it's very accurate In the Midwest and up North fisherman leave 25 foot sleeper trailers pulled by big trucks/tractors on the ice all winter. Owners move them occasionally, but in many instances shacks are left in the same spot all season, or at least for weeks and months at a time. As the ice begins to deteriorate and the sun shine increases owners move their shacks more often because the glare from the ice shack will accelerate the melting of the ice.
The sleeper shacks are heated 24/7 and sit right down on the ice. I don't know how much influence a vehicle would have sitting 8-12 inches above the ice.