First, there is a bus company in Anaheim that does tours. You might contact them and find out if where you want to go is on one of their tours. The address is
www.AnaheimSightseeing.com.
Another option would be to hire a limo to take you. We used Tony the Limo King (lol) who was very reliable. Just be sure to get a written price from him in advance. He took us to Laguna Beach, but mentioned that he does other private tours, and will take you anyplace you want. His website, I believe, is Tonythelimoking.com. I got his name from the folks at the Anaheim tourism and convention center. If you book with him, be sure to tell him the Walshes said hello, lol! He charged us $100 roundtrip for the drive to Laguna Beach.
You might call your hotel in advance and ask what local transportation company they recommend. Hojos set me up with Jag for our trip back to the airport. It was a van service that charged a flat fee- the same as yellow cab. I'm not sure if they do tours or not, but you could call your hotel and ask.
My last choice would be to use a cab. Here's why...if you get caught in a traffic jam (we saw two very large crashes while we were there....) you'd be paying for that time. Plus, you would either have to pay the driver for the time all day, or call the company back when you're ready to leave.
Personally, I think I'd check with Tony and see what he'd charge you. It would be fun to be shuttled around in one of his limos...and the prices were pretty reasonable! Better than the taxis!