All went well - found the room/arrivals lounge. Stopped for a coffee as MrAB84 hadn’t had one on the plane then headed through to wait for the car to the Oryx Rotana.
A quick data point for other readers - we again docked at the c/d/e gates on the flight from Adelaide to Doha so we knew to head straight for the A/B transfer area this time. Except the train wasn’t running and it’s a long walk! Not a huge issue for us but it might be for others.