Yes, that's what I meant. That's funny, we had 80 too. Even with six months' notice a few had already booked holiday, but I was OK with as I really wouldn't have wanted it much bigger. No matter how much notice you give, you will not suit everyone. I actually felt 80 was a little too many as I didn't get round everyone, whereas I really envied Bev with about 30 as she talked loads to everyone and that gave it a really nice atmosphere.
Hope you manage to get a better sleep tonight now you have a provisional date sorted!