I rest the heritage turkey for 5daysBeen there. I butchered two three-year-old turkeys that my boss wanted gone. Waste of time. Both of them also went to the dogs. It was so stringy that it was like eating clumps of wet horse hair. It was early on in my butchering experience so I'm not sure if I contributed to the toughness in someway by not resting or something but, by golly, it was bad.
Traditionally they are harvested the weekend before Thanksgiving.
Cooking is different than the baby BB. Low and slow. I prefer the flavor of the heritage. I don't think they are tough. I roasted a 4 yr tom and didn't think he was tough.