My father (86) and I are planning to spend January in the Yucatan (Chixculub) and would like to spend the first couple of weeks in February travelling to Puerto Vallarta by bus - stopping off in small towns and/or villages along the way. Can anyone give me any advice on this? How long does it take to get to Puerto Vallarta from Merida - do you have to go via Mexico City or is there another route? Which small towns would be interesting to spend some time in - my father would like to see the "real" Mexico? Thanks for any help you can provide.