This is a great campsite in the heart of Big Bend NP. From here there is easy access to some of the best trails in the park. Facilities include toilets and running water, no showers. Be aware, it can get windy and quite chilly in the basin in the evenings (visited in February and March).
This is 100% an RV Park next to I-30. I didn’t see any showers, so for $37.50/night it was too steep for me.
Nice campground, well kept. Without a reservation you put your name on a list that they start going through at 1pm to assign sites. As someone tent-camping this is no problem, just takes some time (site assigned ~1.5hours after arrival at 13:20). But be wary if you need certain hookups. that being said, there are no ‘tent only’ sites. The minimum has electric ($26). There are 3 different areas - each has multiple bathhouses, which have coin-laundry available. Showers are coin-operated as well.
There are 3 different campgrounds within the state park. Each has their own toilet facilities while the bathhouse (aka clean, hot, free showers) is located just across from the park entrance/visitor center. Tent camping was $10/night and super easy for someone passing through - there were 4 sites available as first come first served in the morning. Three were still available at 7pm (on a Tuesday). The visitor center was great, helpful staff and you can buy ice there. There are several hikes to do and the scenery is beautiful.