While I have been to the Mesquite Flat Sand Dunes, it was at the end of an absolutely amazing sunset during a wicked wind of a sandstorm that blasted my eyes and ears and nose. It was miserable, but it was worth it to get the shot, to be honest. I know there’s a 2.8 mile hike in the dunes and that you can go sand boarding but I wouldn’t yet know anything about that.