Visited on May 20. Did a short session with Swisscharge RFID, no issue.
The parking was absolutely packed. Only 3 cars (including me) were charging. The 2 other occupied spots were ICEd.
There are signs explaining how to reach the "night toilets". I didn't explore to see what they were, I'll check that out another time.
I noticed the parking signs "charging, max 2h" also have a parking meter icon. But as far as I know, this parking is not a paid parking. I never saw any parking meter or other payment means.