Normal sleepover supplies: clothes, pajamas, undergarments, athletic attire, socks, tennis shoes, toothbrush and toothpaste, deodorant, body wash, contact solution & case, makeup, face wash, etc. Bug spray, Sunscreen, Sunglasses? Baseball Hat? Sandals? Hawaiian shirt, if you got one.
Additional necessary supplies: pillow and pillowcase, sheets for twin bunk bed, medium weight blanket for overnight (or sleeping bag), towel for shower. Water bottle, notebook, Bible, pens, phone charger.