Would you join?
Yes as odious as Facebook can be, it's a particularly effective way to stay in touch. By the numbers, most people have an account.
Would it help?
I think it will help. Another hobby club I belong to tried to use the forum like this..it wasn't much of a success. Once the group migrated to a Facebook club events have been a snap to coordinate, sync to calendars, and share ideas, topics, pictures of tanks etc. It seems to me to have been a big improvement.
Do you Facebook?
Guilty as charged.