Once the power levers have been brought to ground idle it doesn't matter where the condition levers are between min & max - the ECU schedules enough fuel to keep the props turning at approx 71% (to give you AC Wild power). Normally the condition levers will still be at max from your landing. Of course you can feather one prop while taxiing in, but don't shutdown until the elapsed time has passed - lets the oil/engine temperature even out.
PS Any spare jobs for ATR drivers in Cape Verde?