SailorPaul, we have been to Seydisfjordur, and the included tour was pretty much the same as the self guided tour we did. However, on our Iceland cruise last year, we also had an excursion listed that ended after departure. When we received our tickets onboard, we had a corrected time! I can’t believe the chat agent said you’d be bused to the next port…yes that happens on river ships sometimes, but it is totally impractical, and impossible on ocean! Someone needs to do some more training before giving an answer that doesn’t make sense. Enjoy Iceland!