Anders | Arcturus
So I wouldn't. And having books and drawing sigils doesn't mean you're summoning.
Ordinarily the whole extended family gathers together, even if they have to travel, and there is the feasting and doorstep libations, and the portraits and ghosts tell us stories about the past and the history of our line, and we play divination games. And everyone dresses in their smartest formal robes to be respectful, not in silly costumes.
It's decent of you to suggest it, but I don't know that any of it would work here. Guests who aren't part of the family were always welcome, but without the portraits and ghosts, it won't be the same.