Dates are firm, but details are still pending. Apparently, their Saturday & Sunday tours begin at 6:00 AM, but registration is required for all tour times during the festival. This trip will count toward 2020’s field trips.
Tours, separate from the Festival, are also held first 3 weekends of the month, October through February.
Excerpt from website: 2019 Tour Registration will open online early September and we will be posting other 2019 Festival information as it becomes available from late August through mid-September 2019.