Are you staying at the Marriott the night before? If so, the bus/buses will leave from the Marriott.
If not staying at the Marriott, a
DCL Rep will be at whatever terminal baggage claim you are coming in at.
The different modes of transportation listed pertains to when they have smaller groups to transport that don't need a bus. We came in the day before, and they gave us a private driver in a SUV to take us to the Hilton in Galveston (that we booked through DCL). If others had had similar arrival times we could have been combined with them and been sent on whatever vehicle was suitable.