me and a couple friends (back in 09') used to line a truck with a tarp and go to the 2 hockey rinks in town and went outback and loaded the truck up with a shitload of 'arena snow' that we used for the landing and roll-in, we had the fake turf then piled snow of top. simple 4ft high roll-in with turf and a simple 10ft long pvc piping that we drilled and made a rail stand with and then piled snow at the end of the rail, we did this shit in on a hot July day and we got about 2hrs of use til friction was becoming too much a problem, lol the only summer sesh we ever did! it was labourous