Bother!!!! I didn't have the cache description with me, and I didn't remember that drivebys don't count! This was Skyline Tier, on the East Coast of Tasmania. I should point out that it wasn't an easy driveby, though: the geoSuby got a bit of a workout getting here because it was reasonably difficult terrain (easy enough for a serious 4WD, but I was glad of the low range and fortunately the geoSuby had sufficient clearance). Nearest cache was at least 2km away, and the views from up here (ignoring the tree-felling bits) were good. I'm now wishing I'd jumped out and walked ... but in fact I suspect I'd have ended up only having walked 499m anyway! Thanks, for the amusement; I'll know better next time!