Three tiers of email invites.
1st group is my original 14 players or so, they get first dibs at seats. Second group is my multi-year players of about 6 or 7. Third group is the new players for last year and this year.
I usually fill up in the first and second emails and take 4 waitlists. Inevitably someone cancels and the 1st waiting always gets a seat, 50% the 2nd waitlist gets a seat.
It's not perfect, but it works.
Thanks, that's where I was thinking of heading as well, but felt like kind of a PITA. Appreciate the response!