Hi, GRDNERE,
Thanks for your feedback; Nice to know the statistical ''calmness'' of the seas on that route, 2 out of 2 sounds pretty good odds to me that the Pacific side will give us a bit more '' motion''.
I finally found someone at Celebrity who actually used her head, as opposed to her '' pre-recorded cheet sheet '' when we called for dates of the formal nughts; she put me on hold, checked the proper source and gave us the exact dates of the formal nights ; day 3, 9 and 13.
Thanks, all, for your advice
Cheers
CG