I have a feeling I will be chasing after some, but knowing them, I would have to regardless of what I put as the rsvp deadline. My thought is that most of the group will have already booked by that time and an rsvp isn't really needed since I know they are going. I've asked everyone to send me their booking & cabin numbers and I'm keeping a list. 11 months out and we already have 7 cabins booked! My invites/rsvp will only be sent to those that haven't contacted me at that point. It will have three options...Going and already booked (with space for booking number), Going but waiting for last minute deal (these I will have to follow up on), and Not able to attend.