In June I am going to Dublin, Ireland. There will be four of us. Our layover is in JFK and we will arrive there at 5:30 am. Our flight to Dublin leaves at 5:30 pm. What can we go do and what time should we head back to JFK? Is there a place to stash our carry on bags so we don't have to lug them around NYC? I've never been to New York and would love to see times square, is that possible in 11.5hrs?