How to get there? From Playa Del Carmen you can get a collectivo (a mini van) that goes straight there, just ask the hostel and it should only cost you 35 mexican peso, so just under 2 USD.
Where to stay? I stayed in a place called Chill Inn, which I loved, it had a different breakfast every morning, a kitchen, and big beds with privacy curtains, and you had your own light, fan and a power point. Again if you wanted to find somewhere cheaper you could.
Where to eat? Lots of delicious tacos on the street and great cheap restaurants, they also have some fancy ones too but I didn’t visit those.
Party? Lots of different bars.
Must do.. Go to Akumal Bay, there you can swim with turtles and stingrays, they are everywhere. They will try sell you a $20 US tour but you don’t need to. We hired our snorkle from the hostel for a dollar. And then you just walk to the other end where the beach is not marked off and they just swim around. You can also swim up to one of the tours but the turtles are everywhere. We also got some snacks, beers and a cooler from an OXXO (convenience store) which is just before the entry.
What else to do? We tried to hire bikes and cycling to the beach ruins but in the end we just got a collectivo.
You can also hire bikes or scooter to explore beach further away.
We hitchhiked for the Copa Cenotes (three very different cenotes in one area), and they also have Copa ruins there. The great thing about those cenotes was that we were the only ones there. That is until we got to the last one where some guys were filming a music video. All three were huge one even had a 10m diving board.
Extra info.. Great place to do laundry.