idk man maybe just set it up anyway when theyre away? thats what i did. i had a rail that i had previously only used in winter. one day while the parents were gone i went to home depot, bought some turf, and came home and set it up on the hill in my yard. parents got home and didnt really know what to say. now i have a compromse, i can keep my set up but have to put it away/out of sight when not using it. also did that another time, parents came home and we were unloadng 3 pickups of ice rink snow. they ddnt really know what to say about that either.