Are there standard 120v or 15-20amp plugs for smaller camper trailer to plug into at the RV sites?

Yes it does. We are host here.

I was in an 18 wheeler & stopped for the night... sorry I have no idea🤷‍♀️

I didn't see any RV site... just a test place.

Good place to stop while traveling south

I just drive by, never when into the park.