Originally Posted by Need

Just to be sure, you know Hearst Castle is not really a castle right? It's just a really big home estate, but I am not kidding about the hiking. There are a lot of steps....
Physical Requirements to Tour Hearst Castle

The tour is interesting not really because of looking at someone's house, but listening to the history of it by the tour guide. Also since you are visiting in May, I would suggest their evening tour. They have actors/actresses dressed up 1930's outfit walking around the estate grounds. You do need to reserve ahead of time as those tours get filled up.