I've been there myself in July, when there were lots of skeeters, but not yet with the Scamp
. It's hard work trying to walk up that loose sand!
I think the most amazing thing about it is that it is almost a closed system -- the wind blows the sand and makes the dunes, which march to the river, where the sand falls in and is carried down the river, which runs to the start of the dunes where it sinks underground leaving the sand to be picked up by the wind again. But it's not a closed system because some of the sand is blown across the river and is making dunes against that last set of mountains before the flatlands begin:O
Pete in the RatHaus, who also likes Indiana Dunes Natl Lakeshore