We are not at an actual campground, we are at an embarcadero which is essentially a marina. We don't have services, but the owner would run a 15 amp cord if need be. We also have access to water and washrooms, so although there is no dump station we don't really need one for the couple or three weeks that we'll be here. We are at GPS 19.22465 -100.13935
The owner is a fellow named Chago, and last time we were here we became good friends with him and his family. We had such a good time, and that's why we returned. Besides, it's absolutely beautiful here. Last time, we paid 100 pesos ($8.00) per night to camp here, and I would expect it will be the same this time. We're going to leave Sherman here for a few days while we go to visit Mexico City probably next week.
Temperatures here are perfect, about 23C (74F) during the day, and 12C (55F) at night.