Tie it off with adequate rope wrapped twice around a tree. Let a trusted buddy (not your wife) brake it down the drive. You feed the rope out slowly. The brakes will keep the rope from taking too much tension. Just in case, make damn sure you don't get tangled up in the rope.

If you don't have a tree, tie it to the jeep on level ground with the wheels blocked so the jeep doesn't move.

Or is the driveway too steep?