I am obviously missing something and I blame the fact that I tried this camp for the first time with a couple beers in my system.
85 SK, I'd never been in this zone until last zone, so I took my 85 monk in with me. I (falsely) assumed it was going to be a small zone so we just started clearing everything - easy peasy until we pushed a mob into a wall and trained half the zone from above onto our location. Anyway, kept clearing until I saw how little progress we were making on the map and eventually just took the SK ahead with invis and FD flopping - the deeper you get, the more SI mobs there are - so it was more flopping than I would have liked. Eventually I had gone through most of the zone without seeing a room as described in the comments below, or taking note of any of the locs below. I was probably in here for 2 hours all together.
So, where exactly is this stupid camp and what's the easiest way there? I guess I could try again sober, but I'm not sure where the fun is in that ;)