Towel Washcloth
Jacket  - Sweater
Clothing for the season and place
Flash light
Hat
Sunscreen
Water Bottle or Canteen
Day backpack
Watch
pencil or pen
Bathroom items:
         Ssoap
         Toothbrush
         Toothpaste
         Dental floss
         Comb
 

Optional list:

Swimsuit (if it is the right time of year)
sunglasses

Prayer book or Bible
Camera & Film
Books, Magazine, writing stuff for free time
Hiking boots, if you plan to hike
Compass if you like
Money $30.00
Notebook
Insect repellent
Magnifying glass
Binoculars
Bird and plant identification books
Musical instrument