Hello! Very much looking forward to visiting Castara for the first time in mid January 2018! We are celebrating our 25 year anniversary. Anyway, what is a fair amount of time to allow for customs? We travel with carry on only. Arriving on a tuesday 3;30pm. Not sure what time to book the air transfer and hate to go to late and arrive on Tobago after dark. Also, is there places to snorkel just off the beach? Is it easy to walk and explore? We are used to walking several miles for a visit to a good beach/bar/restaurant. Any suggestions of places to drink/eat are welcome. We love to visit with the locals! Thanks so much!