Thanks for your replies Chuck.
As for your other post on Mazatlan, we did the Shopping Beach Lunch and Show tour. We thought the show was good, and the beach was relaxing. For our (now cancelled) next trip we were considering the Old Mazatlan Walking tour. But there does not seem to be that much for excursions, since a lot of them include the shopping and show. Hopefully you'll get some good suggestions. Thanks again!