On arrival on March 3rd, the tour guides could not find my reservation. Turns out, my reservation had somehow ended up in their system for March 4th. They looked at my Tripadvisor confirmation (which says March 3rd, as you can see in the attached image) and said that the Third Party seller (Tripadvisor) had messed up my booking. They had a fully booked tour, but said we could MAYBE get on if other passengers failed to show up. After a stressful 45 minutes (keep in mind this is at 6AM), they notified us that there were a few no shows, so we could join the tour.
The actual tour was good, however. The tour guides were very cool & knowledgeable. We even stopped to do some impromptu whale watching on the way back. Definitely recommend the experience.