When you get there check the boat schedule at the front desk. We went to MK (reg. hours) and opted for the bus over the boat. MK opened at 9:00 and the first boat was at 8:20 with the next one 20 minutes later. I was afraid of not getting on the first boat and then arriving at MK after opening. The buses start much earlier and it was very quick and convenient although probably not as scenic as the boat.