You can only leave from your home resort. The information regarding your time of pick-up will be delivered to your room the day before you leave.
If you are able to use the RAC or leaving your luggage with baggage services until your ME bus arrives, and you need assistance, you may call or visit the desk of baggage services a few days before. Ask them to pick you up at a certain time, to coincide with getting through the line, or getting your bags to baggage services. You can also choose to take your bags directly to the RAC counter or baggage services by yourself.
If you are leaving before the RAC opens or after it closes, or on an airline that does not participate in the RAC program, then you need to bring your bags directly to the baggage services and then retrieve them when your bus time is ready.
That is why you must leave from your home resort....