You also don't need to be afraid to grab the director after rehearsal and sit down quietly as/after the cast goes (not while you are trying to get the cast to gather and settle), having let the cast know you will be calling/emailing (depending on their techie-ness) that night abt any changes to the next day's sched. That will also allow you to 1) be the voice of the sched and 2) give everyone a heads up that things may, and often do, change, so you aren't worried abt someone not checking email until several days later. That means at the end of reh, you can still read out what's on the calendar, but remind them that they will receive an email/call within abt an hour if there are any changes, so they become aware of not making assumptions.
Yes this may entail a few more phone calls (hey, before most folks had computers, that's the way we all did it) but it will help forestall confusion and those cast "oops'" PLUS it keeps everyone in the loop.
Also, if you know certain actors tend to gravitate toward making plans when there's a TBD and especially they haven't been called for a few days, it's always appropriate to pick up the phone and give them a heads up rather than assuming they know.
