Essentials
Kayak
Paddle
PFD
Sunscreen
Sunglasses w/strap
Water bottle
Energy Snacks
Footwear
Hat (warm +/or sun)
Secure storage for
    car keys
Dry storage:
    Bags and/or boxes
First Aid kit
Whistle
Knife

Optional
Matches / lighter
Camera / Binoculars
Rain gear / warm clothes
Insect repellent
Gloves or poagies
Map case and maps
Compass
Field Guides (Birds, etc)

For rough conditions  
(big open water and whitewater)
Spare paddle
Paddle float
Paddle leash
Bilge pump / sponge
Helmet
Wet suit/Dry suit
Repair kit (duct tape)
Moving water rescue kit
    Throw rope
    Slings (2+)
    Prusiks (2+)
    Carabiners (3)
    Pulley, twist open (2)
    Folding saw
    Pocket tool(“Leatherman”)
    Rescue Book