We did loads of stuff like this last year and just booked through the Hotel but you might get it abit cheaper if you or ebook it think you can do it through cancuncare, don't know if this helps lol
We went there a couple of years ago, but we were staying down in the Mayan Riviera, so I can't really tell you how far it is from TTR. It was a lot of fun. The ziplines go on for days if you want to do that many. We did ziplines, ATV ride, Kayaking through caves & the cave swim. It was all good, but don't expect it to be all "natural" so to speak. I don't know for sure, but I don't think it's all man made either. I think they've just enhanced it for safety, direction, etc. if you know what I'm saying. The enhancements don't take away from the fun, it just that some parts feel more theme park-ish rather than natural. It's still ALL good. We'd go again. It was nearly a full day of activities that keep you busy. One of the ziplines went over a pit that had alligators or tigers or something in it. I can't remember what it was for certain, but it was some sort of predator. We'd recommend it.
We just book it at Temptations for the next day. We wanted to check the weather before we booked. I really dont know what the difference in the $$$ would be; so I cant help you there.