There are a lot of ways to see Mexico. I'd think one of the nicest would be on a tour with Nancy Zaslavasky, author of A Cook's Tour of Mexico
Nancy just announced a tour to Oaxaca for late October (including the Days of the Dead) and the Yucatan for next January. These are small group (10 people or less) and you better have a drink or two for me if you're lucky enough to go.
Visit Nancy's website for more information.