The season runs across the year rather than in a single summer block, which is the useful part for a destination where most attractions close in November.
Book ahead for anything in October, for the Christmas production, and for anything at all in the black box. October is peak season in Fannin County and the theatre fills alongside the restaurants; the black box is small enough that a single coach party would take it.
Off-peak weeknights in January and February are the opposite problem, and walk-ups are usually fine.
There is no complicated ticketing structure to navigate, but prices, performance days and start times are set per production. Check the current listing rather than assuming a standard Friday and Saturday pattern.
Give yourself time to park. East First Street is not downtown Main Street, but an evening performance still puts more cars on that stretch than it normally carries, and the walk from an overflow space is short but unlit.
If you are staying out towards the lake or up Aska Road, add twenty minutes each way and remember the drive home is in the dark.