They do have a list of names with dinner reservations, and you can only park there if you really are eating there. But I dont know where else people would be expected to park if they had reservations at California Grill...Ive never had issues with parking at any of the monorail hotels. Even if Im picking my daughters up from the pool or whatever, the guards are pretty strict, taking your ID, license plate number, etc before letting you in. And thats at any Disney hotel, not just the super expensive ones.