They have clean and free showers, reasonably priced and are a great place to stay. If you are a NM resident get an annual pass for $100 and reg sites are free and elec/water are $4. Nice!
Nice shady area. The full hookup sites are by reservation only. Off season you'll be fine without reservation. The sewer hookups are to the rear so make sure you have at least 30' of hose. Make sure you have the elevator legs for your sewer line because the sewer pipe is up and over a railroad tie which doesn't make for easy draining.
We stayed at the riverside park which is more sheltered and shaded than its sister lakeside park which is more windy, no shade but has access to the lake above the dam. Over the Nemorial Day weekend there were few sites left unoccupied and the park was full of families in trailers and tents. But the park easily accommodate d us all. It never felt cramped or noisy. Would definitely stay here again. Good park hosts. Great birding in the park.