Agree with your choice to hold off on Cozumel. If you are a newbie, Coz is not a good choice. The drift diving is pretty intense and possibly disorienting. I would worry about newbies getting swept away. Drift diving is considered a specialty by PADI. And if you're not drift diving, then it's not worth the hassle to get to Coz from mainland.
---------- Post added February 26th, 2013 at 12:08 AM ----------
By the way, I'm also going to Cancun in June (actually Azul Beach resort near Puerto Morelos). I'm also deciding between local diving and Cozumel. I have about 50 dives, AOW, nitrox, and wreck cards with some night, cenote, and drift diving experience. If I can leave my non-diving wife and kids behind for about two dive days during the week, what dives should I do? I've done the cenotes so I'm thinking one day in Cozumel and one day locally to see what there is near Puerto Morelos. Any advice on operators and dive sites is most welcome. (Hope I'm not hijacking the thread since that's what the OP wanted also).
Does anyone know if June is low season? Will it be easy to book dive trips last minute? For Coz I'll probably book ahead of time with Aldora but I have no knowledge of PM area operators. I don't need a fancy boat. Backwards roll with no ladder are fine with me!