The INAH website is the best place to track down archaelogical sites in Mexico, especially since it can be difficult to find smaller sites online since the internets are dominated by a handful of major sites like Tulum (which isn't even all that major, it's just a cool location by the ocean and an easy trip from Cancun), Chichen Itza, and Teotihucan. There are a few others like Palenque, Uxmal, and Calakmul that are easy to work with too, but good luck finding much of anything specific about Dzibilnocac, Tabasquenos, and Kanki.
But it groups sites by states which works well for Jalisco, obviously, and wasn't too hard in Mexico, but the Yucatecan states have lots of sites and they're all over the place. So here's a little more order:
Santa Rosa Xtampak
Closer to Merida (within an hour):
Oxkintok (1 hour south of Merida)
Between Merida and Tulum:
So the basic plan is to go to Palenque, then up to Campeche and Edzna, then to the Hopelchen area, up to the sites around Uxmal, then on to Merida, over to Chichen Itza, and finally on to Tulum.