Im excited about this trip also. Not much of the dunes but getting together with an awesome group of people who are down to earth and willing to give a hand if needed. DDR. Had me laughing all the way home on our last trip.
Holy hell what a crazy roller coaster that buggy purchase has been. Haha You have got to be going crazy to get it out and play. Sounds like you have it all dialed in now though. That first trip is going to feel amazing. Congrats and good luck getting out there. At this point I wouldn't let one more thing hold me back if it were me!