It doesn't seem to matter if its public, private or homeschooling, schedules are and will always be a little harried when there are greater than two people involved. The wide variety of activities available for homeschoolers grows exponentially as our network increases. Quite by surprise, we find that we still struggle to avoid "over-scheduled" kids (or parents).
The calendar here is a general "heads up" overview for the students. Funny thing, they like to know what days they'll be leaving the house or driving for an hour - just like we do!