No need to haul gear other that your swim stuff, snorkel gear if you have it and some pesos. It is a great place.
You can take a colectivo as we have done except you will have to sprint across 4 lanes of 307 on the way down since it will stop on the west side of the hiway. The drivers do know where it is.
A little scary but not much worse than missing the road northbound and going backward on 307 for about a mile!!