Hit Frazier Park in Ulysses, KS on our way to NM. This city park offers golfing, disc golf, playground, volleyball and horseshoes....not to mention camping spots! Most have FHUs while a couple have only water/electric and a few tent sites.

We stayed here 2 nights and took advantage of the full hookups. For $15 /night we couldn't beat it. The sites are cement paved with a grill, picnic table and bench. Very nicely maintained grass with good size sites.
The lake has fishing - catch and release only. No water sports are allowed in the lake (including swimming your dogs) as there is currently an algae problem.
But we still enjoyed the view and peacefulness of the area. Took advantage of the walking trails and enjoyed the multitude of birds.
This park was also patrolled regularly. We were here over a weekend and there was no issues with people hanging out or partying here. Would definitely stay here again if need be.