Yes, I called and they said yes park with trucks or if gravel behind. Nice large area for any size rig. Best gas prices I have found yet, nice clean place with great customer service.
Agreed, its just a gas station, no overnight that I know of. However, if you have some time... try Rockhound State Park, a lovely park not too far south from town : https://www.campendium.com/rockhound-state-park