Your peak temp hires who come from the inside would be on our Q-list. During peak, they work Feeders, no choice (going strictly by seniority, it seems like I can choose to do peak feeder driving in 705; here, we have no choice).
Outside peak, once sent back down to package Feeders needs are subservient to Package, i.e. they have to "ask" the center manager could they make due without that particular driver that day.
The "replacement driver" you mentioned sounds like a bidded position; that is what we on the q-list are waiting for. At that point we stay permanently in feeders.