Yep - Liberty and Whitetail for a first time experience. Day trip is fine (may need to get up early though).
IIRC Liberty has a "mommy and me" lesson (or something like that, perhaps gender neutral) for first time skiers. You go with your kid(s). slope couldn't be flatter, so low stress. We did it for our daughter at about age 7 before taking a serious ski trip, and worked like a charm. She loves skiing now at age 12.