It was great that they came out to the dunes. Very informative.
One of the other things I forgot to mention was the worm holes aka: kiddie tracks. If you know where one is let them know at the blm station. They will bring the tractor over and fix it right away. So that no one gets hurt. I hit a deep one right on the finger dune, by br #3 where a group had let their kids go up and around until it was probably 3 or more feet deep in two separate spots right through the finger. Those things are killers... Happy I didn't break something!