, you need the rideshare board:http://rideshare.burningman.com
Also, go to "Regionals" at the top of the main Burning Man site. Click on North America, then Nebraska. Join the regional mailing lists!
Sometimes people just get themselves to Reno and hitch the rest of the way. There's an informal, volunteer-staffed rideshare desk in the Reno airport, 1st floor, near baggage.
But try to get a rideshare first.