I've sailed on the Californian during the Tall Ships Festival in Dana Pt.
Nice little sailing vessel. Don't know about going to Catalina on her. If you're not use to ocean swells that can get really big making a rollercoaster of the trip, invest in lots of Dramamine or similar.
The Californian is docked at the same dock as the HMS Surprise, so if you get a chance do take a tour of that ship, it's great!