Thanks all for the suggestions and directions - we found Angels easily. Some minor notes for anybody reading the thread in future:
- the sign near the glider ramp reads "No Entry" (not "No Access).
- path swings (hard! - 160 deg?) left about 50m after mushroom rock. Follow the cairns. We initially turned left too early and almost scrambled our way into trouble.
- Fixed ropes (11 or 12mm static) were all well anchored at the top, and in very good condition. Thanks to whoever maintains them.
- At the end of the first fixed line you hit a trickling rivulet. Can either follow the waterpath, or cross to burrow through some small trees before hitting the next fixed line.
Weather was magnificent, and we had a fabulours four days in the Gorge. TR to hopefully follow.
I'll put up waypoints once I've got them off my GPS.