I don't see it any different than any other get together you would have with friends and family.
Just get some snacks and drinks ready, invite them over, and let the convo take over.
Good luck
I haven't talked to who I thought was my bestfriend (would have been my MOH) since June.... she never once talked to me about my engagement/wedding and I got engaged in April. The friendship just declined after we got home from Cuba... so enjoy your ladies and family, and don't worry about the ones who aren't apart of this!