My husband and I have an event to attend in San Diego on Jan. 2-3-4. I would like any suggestions of what to do in San Diego for a mature couple, no children. Are there any places to go nearby? Cruises, organized tours, etc.? Or would we have to rent a car? Two places that sound interesting, as of now are, the Grand Canyon and Sedona. I still have to get my map out. But do you know of any commercially sponsored trips? Thank you very much.