An RV would fit in a big rig spot, but that's HIGHLY frowned upon. As far as "designated RV Parking", that's a negative. Dump Station's, I have not seen. I'd call them & ask both questions.
RV parking I don't believe no dump
No dump station here and no RV parking. Walmart allows overnight parking 2 miles down the Road
No dump stations to my knowledge. You probably could park an RV in back where the rigs do, but you may want to call ahead first to be sure.
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