Interesting, hadn't considered electrostatic charge pulling in dust. The other problem with the dust is it's very abrasive, so a clear/UV filter is very, very recommended for your lens. Otherwise when you wipe it off it'll make lots of wonderful, tiny scratches.
I will say, for being so huge, you generally don't have to worry about a lot of theft at Burning Man. Yes, some does go on, but often it's someone 'borrowing' a bike or thinking it's their bike. Unfortunately there is sometimes worse, but it's not all that common.