Shelter & Bedding

• Tent
  
• Ground cloth or tarp for under the tent
  
• Tent Extras (repair kit, extra stakes)
  
• Small brush
  
• Dustpan
  
• Tarp
  
• Rope
  
• Sleeping bag kept in waterproof stuff sack
  
• Mattress - inflatable or foam, something light and small
  
• Pillow

Clothing

• Sturdy shoes/boots for hiking
  
• Sandals or light shoes for around camp
  
• Socks for everyday, with an extra just in case
  
• Underwear for every day
  
• Hat
  
• Bandana
  
• Rain gear - jacket and pants!
  
• Pajamas & sleep socks
  
• Swimsuit
  
• Belt
  
• Shorts
  
• Pants
  
• t-shirts
  
• long sleeve shirt
  
• sweater
  
• jacket

Personal

• Toothbrush
  
• Toothpaste
  
• Soap: an all-purpose camp soap is great for dishes and you!
  
• Comb/brush
  
• Deodorant
  
• Toilet paper
  
• Camp shower
  
• Towel
  
• Sunscreen
  
• Chapstick
  
• Personal medications
  
• Kleenex
  
• Feminine products

Miscellaneous

• Flashlight
  
• Extra batteries
  
• Lantern & fuel
  
• Pocket knife
  
• Plastic bags
  
• Park map kept in ziplock bag (keeps it waterproof)
  
• Compass
  
• Hatchet
  
• Saw
  
• Binoculars
  
• Bug spray
  
• Afterbite/hydrocortisone cream
  
• Whistle
  
• Camera
  
• Cards/games/books
  
• Duct tape
  
• Shovel
  
• Sunglasses
  
• Work gloves
  
• Fire sticks
  
• Watch
  
• Sunscreen
  
• Small shovel

Cooking

• Water bottle
  
• Pots with lids
  
• Frying pan
  
• Thermal mug
  
• Soap: an all-purpose camp soap is great
  
• Stove with fuel
  
• Spatula
  
• Tongs
  
• Matches
  
• Lighter
  
• Can opener
  
• Plates
  
• Bowls
  
• Cutlery - knife, fork, tablespoon
  
• Aluminum foil
  
• Dish towel/scrub pan
  
• Good knife
  
• Water bottle
  
• Water filtration system/water purification tablets

Food

• Breakfast:
  
  • Oatmeal
    
  • Granola
    
  • Eggs and smoked bacon
  
  
• Lunch:
  
  • Bagels
    
  • Peanut butter
    
  • Jam
    
  • Soup mix
    
  • Salami
    
  • Cheese
  
  
• Dinner:
  
  • Fresh meat (first day)
    
  • Frozen meat (day 2)
    
  • Dried/freeze dried meats
    
  • Instant potatoes
    
  • Pasta - those packaged side dishes work great
    
  • Rice
    
  • Dried vegetables
  
  
• Snacks:
  
  • Dried fruit
    
  • Nuts
    
  • Granola bars
    
  • Jerkey/pepperettes
    
  • Candies/chocolate
    
  • Trail mix
    
  • Marshmallows
    
  • Graham crackers
  
  
• Beverages:
  
  • Tea
    
  • Coffee
    
  • Hot chocolate
    
  • Juice crystals
    
  • Powdered milk

First Aid Kit - here are some suggestions, but it should really be customized to the number of people, where and how long your trip is. Lots of places also sell kits for adventure trips.

• Hard or soft waterproof case marked 'first aid kit'
  
• Triangular bandage
  
• Splints
  
• Roll of gauze
  
• Adhesive tape
  
• Tensor bandage
  
• Bandages of various sizes
  
• Antiseptic wipes or small bottle of rubbing alcohol
  
• Polysporin
  
• Sterile gauze pads
  
• Transparent dressing pads (they let you monitor healing progress)
  
• Aspirin/Ibuprofen/Acetaminophen
  
• Tweezers
  
• Safety pins
  
• Scissors
  
• Personal medications
  
• Latex gloves
  
• Splinting materials
  
• Butterfly bandages/Steri-Strips
  
• Friars Balsam (helps things like moleskin and bandages stick)
  
• Thermometer
  
• Moleskin
  
• Whistle
  
• Emergency blanket
  
• Nail clippers
  
• Small mirror
  
• Allergy medication
  
• Gravol
  
• Solarcaine spray (especially if you burn easily)
  
• Tick tweezers
  
• Second skin
  
• Lighter

Another great idea:
Leave a complete change of clothes in your car along with some snacks and drinks in a cooler. It'll give you something to look forward to no matter what the weather's like on the last day!