Once scheduled, how do you deal with cancellations? Is it the umpire's responsibility to find a replacement? The assignors? Just curious.
For myself I schedule the summer games so I work when I want to or can't get anyone else. I usually allocate everyone else first and there's plenty of slots open for me afterwards. The majority of summer ball is weekend DH's, or tournaments. I'm attempting to schedule the entire season in one shot. Problem with that is a couple of guys' work schedules' change weekly.
College Season is scheduled all at once.