Destination Wedding Invitations & rsvp

Hello All,

I am having a destination wedding on June 5, 2021 at an all inclusive resort in Montego Bay, Jamaica. We have blocked 40 rooms for family and friends. Any rooms not booked and paid in full by December 1, 2020 must me dropped. While our guess will still be able to book as part of our party up until March 2021, rooms will be based on the resort's availability. We sent out save the dates 9 months before the December drop date for the rooms, and our guess seem to really appreciate and welcome the advance notice. Looking around online it seems like formal invitations and RSVP's for a destination wedding are sent 2-3 months before the wedding. With the drop date for the rooms being in December 2020, should I send the invitation and RSVP's 2-3 months before then to give guess a final opportunity to book one of the block rooms or wait until 2-3 months before the actual wedding? Any insight is welcomed and appreciated!