The only one I'm aware of is Handbook 2: 13.6.12 "Overnight Activities". But that would only affect the youth groups.
For the Facebook, I'd refer to Internet.lds.org. I'd look at the purpose: "Members should have a purpose and goal for the resource, such as community outreach, increased friendship between members, and so on, and the resource should be named accordingly." and "Prepare all online content with your audience in mind. Content that is appropriate for local news reporters may not meet the needs of the active members in your ward or branch. Focus on the content that is relevant for the intended audience."
You may need to determine if such requests are consistent with the purpose.
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