Every branch on the same page
A family reunion is one event and five or six separate guest lists โ each household, each branch, relatives in different towns who hear the news second-hand. The page that works is the one every branch can open and reply to, so cousins you've never met see the same thing Aunt Ruth does. Everyone needs the plan, the address, and a clear way to say how many of them are coming.
There isn't a family-reunion design in the app yet, so you start from the nearest celebration setup and make it yours. What carries over is exactly what a scattered family needs: a shareable page, replies tracked against names, plus-ones and children counted on each reply, and room on the page to tell the family history.