We were on Fantasy 2 weeks ago and took the
DCL bus from MCO to the port. They loaded our luggage into a white box truck and we didn't see it again until we were in our staterooms. That's one of the reasons people who test positive at the port have to wait so long before they can leave - it takes forever for them to find your luggage. I have a list of all of our bags in my notebook in my backpack before we turn them over. Just to be safe.
With the DCL bus, you don't have a "port arrival time." You are in the queue when your bus arrives. Once you clear the COVID testing, we went right through registration, security and then right onto the ship. We **technically** were boarding group 6, but there was literally no one in line when we walked through the terminal and they ushered us right on board.
The bus at MCO is usually at B40, B41 or B42. They'll have a DCL kiosk set up right inside that you have to check in at first. Make sure you remove your airline tags and put your DCL ones on first though.