I ended up near an abandonned church, I had to walk the rest of the way as cars were not allowed to proceed to the end:
a church turned night club, that was a new one for me...
dB meter to make sure it doesn't bother the neighbours too much :)
I was there at 22:00 when the event started, but unfortunately it was very uninspiring minimal techno for hours that eventually turned into something that was slightly better, but nowhere close to what I'd call psytrance. I'm not sure if it got better eventually, but I bailed around 02:30 and went to bed to get a few hours of sleep before my flight back to SFO.
In highsight, that night was totally skippable but oh well, given how good all the other nights were, that wasn't the end of the world.