From My Experience (we used to only get to travel this time of year), it means they will take money if you park there.
There will probably be electric available (often limited).
One had a "heated bathhouse" with "hot" showers. (This all required stretching their poetic license.)
Several did have potable water available from self draining hydrants - you could not leave the water on over night.
Sometimes (not always) the dumps are open, but with no clean up water available.
Unless you call them and confirm, don't count on much.
What ever you do, don't leave a water filled hose out overnight. They are no fun to deal with in the morning. (It was near 40ยฐF when we went to bed.)
Matt
Matt & Mary Colie
A sailor, his bride and their black dogs (one dear dog is waiting for us at the bridge) going to see some dry places that have Geocaches in a coach made the year we married.