I'm told that if you call hearst in advance, they will make parking arrangements for atypical needs.
In addition, about some 40mi north of hearst lies an affordable hotel on the ocean side with a cliff view, good restaurant, and the like... I've stayed there, it felt like a holiday. Price was reasonable. View was cool. Restaurant was good. Very relaxing place. Hotel has arrangement such that you can get a room near your car and keep an eye on it; though I had no worries when I was there, it was very mellow; almost vacant. About this time last year is when I went.
http://www.hearstcastle.com/
http://www.raggedpointinn.net/
http://maps.google.com/maps?daddr=19...904386587&om=1