The shopping aea in Mahuhual is just a dirt road through the town, but the golf carts can be driven on it. You might want to check out this review:
http://www.cruisereviews.com/RoyalCa...ftheSeas26.htm . Scroll down my travelogue to the day in Costa Maya and you will see pictures of the golf carts and the main street in Mahuhual.
Nancy