I am looking for a nice family vacation with my husband and 2 teenagers (16 and 19) next Christmas. SCC has great reviews and looks fabulous (and my husband is a diver) but I'm worried it might be too tranquil for teens. Are there many kids around? (we don't like crowded, i.e. Grand Cayman, Cancun, that kind of thing, but don't want it to be too dull for them either!