I believe during the special youth hunts, you are not allowed to carry a hunting weapon. The exception might be the youth duck day. Legally, geese are also in season, so you might be able to hunt/shoot them while the youth hunts ducks. Once again, I'm not clear on that.
If you're talking about a mentored youth, then you are not allowed at all.
She would be the only legal hunter in a youth season and
she can carry the gun if she is 12 or older. Mentor youth
hunts the mentor has to carry the gun for the youth while
moving. The youth can only handle the gun/bow from a stand