I just dropped off Bailee for a camp out with her Venturing Crew. It is for one night. She asked me if I thought she packed too much. Good question...it looks like a body bag BAILEE! That might mean it's too much.
In her defense, she has a 2 man tent, her sleeping bag and her pillow in her bag plus her personal items. I suppose carrying one item (that is as big as you are) is easier than three reasonable sizes. :0)