Below is a list of items that decidedly can make a difference to your AT hike:
BACKPACK
Backpack
Spare Buckles
Waterproof Pack Cover
Cable ties
COOKING & WATER APPLIANCES
Water treatment Tablets
Water Bottles
Water Bags Zip lock
Cooking Stove - MSR
Fuel
Cooking/Eating Pot/Cup
Spork
Box of Waterproof Matches
Bic Lighter
Bear Food Bag
OTHER
Duct Tape
Toilet paper
Toothbrush
Toothpaste
Dental Floss
Hand mirror (signalling)
Vitamins
Whistle
Sunglasses
Money, ID and other documents
First-Aid
NAVIGATION & COMMUNICATIONS
Digital Camera
GPS, datacable
SD Card with software, maps, shelters and routes
AA Spare Batteries (For GPS)
Mobile Phone/PDA
Journal Pad & pens
Set of Charts
AT Data Book
AT companion
CLOTHING
No cotton
Waterproof jacket
Waterproof long trousers
Thermal long-sleeved underwear
Waterproof gloves
Glove Inserts
Socks - Sleep and Spares (2- pair wearing)
1 set of clothes walking - can get wet
1 set of clothes sleeping - keep dry
Hiking socks
FOOD AND WATER
2 Litre of Water
Six-Day Supply of Food