We were just down there from the 13th to 19th. You check in 48 hours in advance (central time) so 1am thursday morning EST (tonight). Be sure you log into the right check in, they look the same (Cancun and PDC) check your browser address. When we did it the thing kept directing us to Cancun and couldn't find our reservation (of course) but we hit instant panic
Anyway. We stayed in room 286 in the Tulum building. It had the smaller balcony without the hammocks (which we didn't miss) but was angled toward the beach and the closet to the beach you can get for that room type. All the rooms next to use had the hammocks. It was on the courtyard side of the resort so no pool noise, but the pool was right on the other side of the building so easy access to both. And right next to the stairs & elevator.
As for the tours, we booked early since there was a discount. We did the Coba Tour with Alltournative tours. We were a little rushed as we got a late start but it was a fun trip, you do alot since you zipline, rappel into a cenote and tour Coba. They have a storefront on Fifth though so I can't imagine there is too much difficulty booking there. Don't hold me to it though
Have a great time!
View from 286
Our room, 2nd floor corner.