Hi Wendy, we are sailing 2 weeks before you do but we have booked a dive/snorkel trip in Cozumel you might want to check out. My BIL as well as 2 friends will be diving and the rest of us 2 adults and 4 kids will be snorkeling. Eagle Ray divers has customized a trip for us. They do a lot of dive trips with small groups (max 10) My BIL was thrilled to learn that there will be ONE dive master for the 3 divers! He said usually there is one dive master for up to 10 divers. This company can "team" you up with other divers for uncrowded day of diving. Although I have not used them myself yet (we booked with them last year but did not make it to Cozumel due to a hurricaine) but, I have read a TON of great trip reports from other cruisers/divers/snorkelers. The prices are VERY reasonable, and the communication with them has been excellent.
Here is a link to the web site:
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