I attend the same XPLOR activity at PB/NJ like Smithy, and he is right.
I'm a moderate level rider, and all I can say that on sand-riding ball is on your court. Suspension or tire pressure (Jimmy's Advice) do NOT play a role on this big homongous bikes, maybe slightly if you are a competitor level rider, racer etc. Only one thing is VERY important, which is knobby tires. Contie's...Rest depends on you.
Relax, smile if you can, keep your weight on back tire mostly, but don't pull grips. Stand on pegs, keep on throttle, not necessarly fast but keep it in stable speed, look ahead, chin up always. Keep your shoulder parallel to handlebar.
If you feel you're too fast it's too late. Don't brake. No panic, clutch in... Do not fixate any object. You'll have a lesson there. Next time use this lesson. Scream, yell and swear in your helmet but keep yourself as relax as possible.
You have to reach the fine line between scary extra cautious boring riding and riding dnagerously out of your head. One should force his/her limits a little for progress.
Did I do all these? Not really. Maybe 30-40% but it was great fun and worthed to try.
I'm sure there are scores of more tips around. Attend Americade, get a course from Jimmy as Smithy suggested. Ask questions to adnvanced riders, everyone is helpful around.
BTW. Do not ride alone. You'll drop it, and after three or four pick-ups you'll be dead.
Well not lierally but... It's very VERY difficult on sand.
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Hell must be full of tasteless motorcycle designers... DD