This one has eluded me as I don't often see the carpark at Cape Jervis ferry terminal for long enough, (I'm the designated driver). We got there early for the 1000h ferry to Kangaroo Island and had to wait "upstairs" while the last few cars got on the 900h.
A few muggles about made this a rating 2, but the difficulty and terrain were 1 each. The cigarette butt quotient was rather high though.