It was pretty tough
I removed the vent "nozzles" (I am not sure of the proper term here but it is the piece where you direct and/or shut off the air flow from the dash). I was trying to get to the center vent damper actuator and totally removed the center right nozzle, moved the center left nozzle out of the way and then removed the rubber "boot" piece between the a/c ducting and the location where the nozzles had been. Once all this was out of the way I could see the linkage between the actuator and the damper door.
Took me a little while (and a few choice words) to put it all back together.