Unfortunately, although it LOOKS close, a person can't just walk out the gate and across the road. One has to walk all the way down to the end of the port, out the gate. out to the main street, cross the street, back up to the
walmart and across the parking lot. it's at least a mile each way.
Beer is sold there, as well as vanilla and many other tourist souvenirs. I bought Mexican chocolate (formulated with a higher melting point), hot sauce, coffee, and salsa in juicebox size cartons for predinner noshing. Just a hint - buy your vanilla back in the baking supplies area - it's cheaper than in the souvenier section.