Got to be the "human washdown point" at BATUS.
I thought the mobile bath and shower unit was a myth until I got trucked there between exercise phases. Still, it was easy to find, it's normally about 3 clicks in front of the Artillery gun line.
It was a bit scary though, the people running it were all 65 yr old CPL's who dribbled while they watched you get changed.
2 OTC cadets (fortunately opposite sexes) going for it in the back of a LR like it was their last day on earth...the funny bit was when the 3 of us in the covert OP they'd parked next to cheered just as he was hitting the vinegar stroke causing her to launch him off, pure quality.