Best thing I ever bought for my van. Great in the winter, with the cover over, too. NO condensation ever.
Tarp to stop rising moisture. Does well too. I raised the ‘tent’ by 4” on sleepers, pinned to the ground with pegs made from 2’ long rebar. It gives the doors at each end room for air to travel under the van. Rain never blows in. The board is for jacking the van up on, as it is a gravel ground underneath. The whole thing is lashed down to the ground by the orange banding straps to 2’ long screw in ground anchors. Been fine in the winds we’ve had.