Getting off and on the ship as a B2Ber is not the same as getting on for 1st leg (if you wish to "remain on ship" so to speak). You are not with the masses but in a B2B group. I have had a seamless turn around where we walked to the gangway, dinged out, did a u-turn around the dingy, checked in a few feet away. Also have dinged out, entered terminal, sat for a few minutes , dinged back in. In Nov we stood for about 20 minutes before dinging back on. Also have had other variations. As said before, each turn around is different but nothing like getting on for first leg. There is also usually a luncheon for B2Bers- some great some not so good.
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If you'd like to retrieve old sea pass card go to guest services.