Hard-core reenactors will try to eat seasonally and regionally appropriate food, sew inside seams and undergarments in a period-appropriate manner, and stay in character throughout an event.
Confederate
Encampment
Hard-core reenactors generally seek an immersive experience, trying to live, as much as possible, as someone of the 1860s might have. These folks are also called thread counters – a reenactor who insists a historically accurate impression, down to fabric and buttonholes having the same thread count typical of the time.