Driving about 100 yards, or towing it with the lug nuts backed off a couple of rounds won't hurt anything. I usually use the biggest sledge hammer I own and hit the side of the tire from the outside. This usually jolts it loose. You can't really get a swing at the inside of the tire. Occasionally we have an aluminum wheel that really gets stuck on a steel hub. We use one of these if all else fails.

http://www.kienedieseltools.com/p-2...GKdgVHkjZdgGiq2D_HHBgOXq4ibUhhoC5xvw_wcB

If driving with the lugs loose and hitting it with a sledge doesn't work, you can rig something like this with a bar, some chains and a bottle jack.