I have a driveway that is difficult to push the pop-up with the hard plastic wheel on the trailer jack. Has anyone seen any inflatable or rubber wheels that could be used for this? My driveway has some unlevel areas and its hard to push. It can be hard to turn the wheel to change directions and to go over cracks and bumps. Just wondering what others are doing? I searched for some threads on this but didn't see anything too recent. Thanks!