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wouldn't use any skis, boots and especially bindings you care about. I just used thrashed park & tele skis but even old cheap straight skinnies would work just fine. Snowboards were fun too. You can prep the bases and get more speed but it usually wore off after a run or two. There are some decent dunes on Lake Michigan to do this on too but not as big as grand sable banks (assuming that's where your pic is not too many places look like that)