I do suspect that the ear protection might have some trouble staying in correct position for her

Not 100% sure those earmuffs are going to work for her.

Gun on the table should be pointed down range, even if unloaded and locked. The RSO would probably be a little annoyed about that.

I don't know anyone that wears a gun belt and placard to an indoor range, aside from when there are USPSA/IDPA matches at the range. Certainly not a sling. Just saying.