Slightly off topic but how is the driving situation in the touristy areas like Cancun, Puerto Vallarta, Cabo etc? We're going down there for New Year's and I was trying to decide between a car rental or airport shuttle. I remember my college days where we would leave our cars at the parking lots in San Ysidro because of the problems driving into Mexico. Of course that could have all been legends to scare us from drving across the border....