Just updating my own question here, La Mesa is open and very good. There is room for a bunch of rigs, but it is just a long-termer and I here for the Day of the Dead celebrations coming up.
One note is that you cannot turn left directly into the road to the park anymore, they have a barricade down the middle of the highway (120). There is a place to do a wide u-turn just a few hundred meters up the road.
The road to the park is still very rustic, but passable. They do have a new entrance in town now, which you could access with a tow vehicle, but not with a rig of any size.
Great place to stay, with an amazing view of Patzcuaro. A quick easy 2.0 km walk into centro, all downhill. A collectivo or inexpensive taxi (50P) will get you home if you do not want to walk back up the hill.
Good restaurant on site with craft beers on draft. Reg rate is 280 pesos a night with all hook ups. Wifi in the restaurant. 30 amp plug in! They have a Facebook page and Beto answered our direct messages to him.
Rob