There are a few people looking to transport their cars to O'fest from California. The best deals (in terms of cost and schedule) involve filling up transports. I started a google doc page for people to list their requirements, so people can coordinate shared transport. If you're interested, let me know and I'll add you to the list. There are about 10 people, counting "maybes" on the list. I've gotten estimates from several transport companies. Ballpark costs range from about $2k to $3.5k per car for a round trip in an enclosed transport.