We have stayed several times at the Wichita Falls RV Park, never as a destination but as an overnight on our way to or from Colorado. For that purpose it has always been very good for us. It is an older park but the sites were level and hook-ups were fine. Plenty of room to walk with the dog.
It is on US 277 South, convenient but well away from the freeway traffic.
This would be our choice in Wichita Falls for an overnight stop. -- and if we needed to stay in the city for a few days I'm sure we would go here. That's our experience. We have not stayed in the "free" park beside the freeway or in any other park in town.