Sleeping bag or sheets for beds
Pillows
Towels
Swimsuits
Sunscreen
bugspray
Warm layers for sitting around a campfire
Flashlight/headlamp
Water bottles
Shower shoes
toothbrush/toothpaste
Dress up clothes and comfy clothes
Tennis shoes
Floaties
Walkie-talkies
Fishing gear
Any games you may want to play (board, card, or field)