Cannot understate the almost-instant relief from vinegar spray. We bring a gallon of vinegar water, a football, and a strip of spare carpet.
Bike seats... make a fuzzy bike cover. Maybe make a few in case they get sweaty. You'll see lots of people with bike seats stamped into their asses, which isn't as bad as a toilet seat ring...
The alkali dust tortures your feet, eyes and lungs, but as for the skin it feels like it has a healing quality. It's like talcum powder. Won't protect you from the sun, though.
The elevation of Black Rock City is about 4,100 feet above sea level and the sun is so direct that the water itself is sunburned to death. You know what sucks? A dick sunburn at Burning Man. If you can't have any fun at Burning Man because your dick is too sunburned, you did it wrong.
Forfucksake, don't liberally-apply sunscreen to your naughty bits in front of people because it confuses the tourists. It's better if you have a bunch of friends do it to you.
"The Red Baron is smart.. He never spends the whole night dancing and drinking root beer.. "-The WWI Flying Ace