How expensive are things on the Cayman Islands?

Question

Hi! My parents are sending me and my fiance somewhere in the Caribbean for our honeymoon. They are covering our airfare and hotel stay (using miles and points), but we will have to pay for all our food and activities. They were thinking of sending us to the Ritz-Carlton Grand Cayman, but I was wondering how expensive the Cayman Islands are in terms of food and activities. How much would we expect to pay for a casual meal, a snorkeling trip, a kayak rental, a museum admission, and things like that?

Thanks so much for you your help!