I've done all the cenotes along the Yucatan that have become accessable, or at least most, but the timing won't be right. There must be some around somewhere? Sounds like a good hunt and discover deal.
Should be arriving San Pedro around 3/18 thru 3/20 for 3 or 4 days.
As most of us know, San Pedro isn't that big, and news travels fast. Having a sunset spot for meeting is a Caribbean tradition...then can all exchange experiences and go their own way. Sounds as if I'll bumb into you guys one way or another......Bob