There are 2 boats. The small one goes WL/CR/FW (any order) and runs 7am - 10pm. If you have a PS & need to get to MK early, just take this to CR & either walk or monorail to MK.
During our Sept stay, the larger boat (WL/FW/MK, any order) started running 1/2 hr before park opening.
As Tyler always says, ask someone in purple pants when you are there. I asked a front desk CM & she gave me the wrg info! Thank goodness I had the right info from these brds!!