My family (including our 13 year old son) and I have 9 days to spend in Greece next April - we are thinking ATHENS 2 days/2 nights, then fly to Crete for 3/4 days, then fly (or ferry or cat?) to Santorini for 4 days, then fly to Athens for our departing international flight on the evening of April 26th. Is this too rushed? Should I do Crete or Mykonos? I have heard wonderful things about Santorini so that is a must. Your advice would be appreicated.We like sightseeing, walking, swimming (but April may be a bit cool?), wining and dining, relaxing.