We did the self assist onCarnival Conquest when we returned to Gaveston on the 4th. We were the first people off the ship. There was a delay in getting to the peer for about 6 hours due to fog. We stayed in our rooms until 30 minutes before time to leaving the ship.
We have done this several times now. If you can handle the baggage safely I would do it. It beats looking around for the luggage in a holding area.