Clothing:
Water shoes, sandals or canvas athletic shoes
Quick-dry pants, shorts, shirts
Quick-dry underwear
Fleece jacket and pants
Socks

Food/Water:
Water filter/purifier (Never drink unfiltered water from the stream!)
Water bottles/Water bladders
Energy bars/snack food
Freeze dried/dehydrated food
Backpacking cookstove
Fuel
Cookset

Sleeping:
Sleeping bag, preferably synthetic-filled
Sleeping pad
Ground sheet
Tent (Optional--know the weather)