My other club (MNToyx4's) used to contract a car hauler to haul rigs to the BHCC. I can't remember what the cost was but it wasn't too bad.
I recently found out that my boss has a brother who lives near the Rubicon and he owns a cruiser. We have had some discussions about going out there for some wheeling. We just bought a company truck so the reality of towing my rig out there isn't too far outside of the realm of possibility.