I'm sorry you missed the information. However, the date of the staff retreat (and all future meetings) was noted in the January, February, March, and April meeting minutes (posted
here), and the meetings and staff retreat are also listed on the calendar which is linked from the main web site (
here). However, I am not sure which at which meetings the meeting schedule was read aloud in. Also, on the staff mailing list, we did send out a reminder a few days before the RSVP deadline to all registered staff. If you PM or email me your full name and email address, I can check to see whether you are on the staff mailing list, but only people who have officially registered by filling out and signing a staff form, received director's initial, and paying staff dues are subscribed to the mailing list.
However, I'll keep this in mind for more ways we can publicize the information.