My husband and I are planning to drive down to Texas in a few months and we would like to go over into Mexico for a day to shop - whether it be drive or walk across the border. I have a few questions...where is the best & worst place to enter Mexico? Best place to shop - when I say shop I mean like the little side markets? Do you need a passport to enter? This is our first trip to drive down there - have visited by cruise in different ports before. Any and all information would be grateful.