When Lahaina was devastated we heard its residents asking for a time to try and heal as best they could, and we want to give them their space. For that reason we personally cannot recommend going back to Lahaina now. Central Maui may not be as interesting as Lahaina was, but it obviously is closer to your ship.. A rental car might be nice, but you really don't have the time to make it worthwhile. You can walk to Maui Mall and/or Queen Ka'ahumanu Center. Not exciting or anything resort-ish, but it shows you a bit of life away from the resorts.