Assuming no delays, my plane lands at 5:30 am and I have a 7 hour layover (leaving at 12:40). I'm traveling alone and wanted the convenience of the group tour that leaves from the airport - at 9 - to take a boat ride. Is this even reasonable? I've taken plenty of tours that didn't leave on time. Or should I just take a train in town and figure how to do myself - not speaking the language. Oh, and it's a Sunday. Thanks for any help.