We stopped at the Color Marino (formerly Onac) near Teacapan Sunday. There appears to be more cabins now than there were when we last camped there in 2007. One cabin was still occupied although the guests were checking out. Some of the other cabins did not look like they had been used although an employee there told us all cabins had been booked for the weekend. The employee told us that the cabins are all booked every Friday and Saturday night as a rule. The one cabin we looked at was very nice, cookware, linens, and a mini-split. The cabin we looked at did not look like it had been occupied recently.
The campground looked like the hookups still worked, at least the water tap did. 30 amp breakers with the proper plug. The campground did not look like it had seen much use recently; it wasn't overgrown or neglected but there were few signs of compaction or vehicle traffic. The road in from the highway had been much improved from what I remembered it being; no sandy hollows to bog down in but gravel and stone to give a better base. It was still narrow but with carve outs to pull into when meeting an oncoming car or truck.
I've heard the RV spots are very expensive but couldn't find any information there or online. The public area with the pools was clean and attractive but there wasn't anyone using it or representing management.
The entire facility isn't well marketed. The beaches are of course as beautiful and deserted as ever.
On edit... The highway in from Escuinapa has huge high tension pylons along the road with cables up and everything rigged for use - it all ends where the ferry crossing used to be years ago. The last pylon has a small conduit tray connecting the overhead cables to buried conduit but that type of power isn't normally buried - too high voltage. Not sure what the deal is there. Fonatur ?(spelling) had big plans for Teacapan as the next Cancun tourist destination - but so far not much progress.