I raised an orphaned woodchuckling years ago, and it became quite tame. However, as they get older they become solitary and territorial. I was able to release the 'chuck to the "wild" of an abandoned orchard/nursery where it wouldn't be a pest to anyone but would have lots of food and burrow territory.
Also, I used to work at a science museum that always had a resident woodchuck, always an adopted orphan that grew up and lived out its life surrounded by people and "domesticity." While these 'chucks could be handled, we ALWAYS used gloves, and never did a public demo with them if they were in a cranky mood. Only when they were in a good mood, and even then we bribed them with "woodchuck bisquits" so they would spend most of the demo eating!
Woodchucks are not sociable by nature. BUT again, while they will be territorial and charge at you to protect a burrow when there are babies, they will not attack to bite if they are normal. The first defense (if there are no babies) is to scoot down the burrow. If there are babies about, the mother will whistle, which sends the babies scooting down the borrow, then momma follows. Males usually just scoot because they do not stick around to help raise babies.
So unusual to have a woodchuck not only not break off a charge, but to run in and bite. That's what makes me uneasy, and why I hope all the best for the OP!