Our tickets were for debarkation day at 9:30 and that seemed to work well. Breakfast ends at 8:30 and you need to vacate your cabin by 9. It's not too far of a walk, so we left our bags on the ship and returned to get them about 11:30. FYI, online tickets that include an oral presentation and then the regular tour of the museum are released 2 weeks in advance. I thought our docent was wonderful and that it really added to our overall experience.