is right. No need to go through Reno or even through Gerlach, NV (you can see Gerlach off to the right, and detour through it if you want, but technically you wont drive through town). Directions from the PNW to BRC are in the 2010 Survival Guide, which is a must read:
http://www.burningman.com/preparation/t ... o_brc.html
Basically, you drive south until you hit Eugene, OR, then start heading diagonally East across the state towards Klamath Falls, which is a fine town for last minute shopping; they have a very good full service Fred Meyer store there on Washburn Way right off the interstate, where I like to pick up any forgotten items + bread & water; purchases I like to delay 'til the last second. (If you're relying on this store for anything, call ahead & check their hours.)
Then South to Alturas, CA (a good place to load up heavily on gas at the ever-popular Chevron station) and the little towns after that . . . Cedarville, etc. I would advise a road atlas featuring OR, CA and NV.
It is definitely possible
to drive straight through from Seattle--I know at least one person who's done it--but not advisable for most. It is a long trip even when you divide it in two. Reserve drivers may find it impossible to nap while other people are driving. Also, the trip is at least 15 hours (not including breaks or shopping). Do not listen to Google Maps when it tells you that it's about 13 hours, because the last 90-120 minutes you will want to go slow due to cows on Rt 447.
Camping or getting a motel halfway (mid Oregon, in one of the small towns) is a really nice way to go, because when you arrive, you will still have to:
1) wait in line 2-3 hours to get in, if you're lucky, and if your ticket is at Will Call, add more time.
2) set up your sleeping arrangements (another hour?) Sleeping in the vehicle, when there are several people, is miserable unless you have an RV.
Full 2010 Survival Guide is here:
http://www.burningman.com/preparation/e ... index.html