If you have a tire that's aired up on that wheel that's locked up, you shouldn't need anything under it to drag it to the shop. It should slide just fine. You might need a tractor or 4x4 if you have traction issues with a 2WD vehicle doing the dragging.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.