We are booked on the Carnival Pride for June 2008, and will be visiting Puerta Vallarta, Mazatlan, and Cabo San Lucas. We have never been to these ports before, so have no idea what to do. Whatever excursions we pick need to be low impact as I have MS and my walking is limited and I sometimes use an electric scooter. I know some people choose to book with vendors other than Carnival because of cost. However, we like to stick with the cruise line excursions. Can anyone give me recommendations as to the best way to see the culture and "must see" sights? Thanks!