We have an opportunity to stay st Marriott Vacation Club on Singer Island in early January. Will there be activities available like snorkeling, jet skiing, deep sea fishing or is everything shutdown at that time of year? We will be group of 10 with 5 teens 16-19 years old. We want things to do and to hang out on the beach and at the pool. We are from up North so mid seventies should feel good to us, but we want to make sure there will be these types of things available and any other fun things! Thanks for any info!