Well my leg is getting better and I've re-booked my trip to Gansu for late April.
The plan is to follow in the footsteps of Joseph Rock to visit Choni (Zhuoni) monastery south of Lanzhou and also Ragya monastery (Lajia), which is actually in Qinghai, near Anye Machen.
It's not exactly going into unexplored territory as there have been many people already visiting and blogging about Ragya at least. You can read more about it - and see some great photos of the area - at the excellent blog by Jonas (a teacher at a school near Xining) here.
