Keep it closed up as much as possible.

Don't pop the top (although, the dust will find it's way through on a
Westy).  Regular Vanagons stay much cleaner inside.

It's just Playa dust.  The alkali does like to dry things out
(especially feet), but it's not as bad as everybody thinks.  Wash and
go...

Unfortunately, I wont be there this year to search your vehicle at the
Gate, or to catch the ones who like to try to sneak in across the
playa.  Still stuck in Indiana...

Cheers,

Jeff