I think there is a link to "CD and Bears" website where he lists a very comprehensive checklist for he and his wife and their 2 bikes for a camping trip. I will see if I can find it.
EDIT: OK, here is the link to CD and Bears website and packing list: http://www.cdthayer.com/cruiserlist.htm
In the meantime here are a few items that I thought of:
Tire plug repair kit. (While touring in Utah last spring, my friend had to plug a hole with a screw scrounged from someone, and rode over a 100 miles before he found a place to repair the tire properly. He now carries a half dozen various sized screws for any similar reoccurance. Not ideal, but it got him back to town.)
One or more methods for inflating a tire.
First aid kit
Swiss army knife and/or lockback knife with serrated blade
3 or 4 flashlights with extra batteries. One would be an AA or AAA single cell mini mag on a cord or strap around my neck.
Extra keys for "everything"
Extra pair of eye glasses.
eyeglasses repair kit, - screws, nose piece, screwdriver, etc.
Strap or cord to secure eyeglasses/sunglasses in place while riding, or hang from neck while resting.
Don`t carry all your cash and credit cards in one place. If your wallet is stolen or lost, you still have other resources hidden away elsewhere.
Spare headlight bulb and all other bulbs.
extra bungee cords and/or light rope or parachute cord.
1 qt. bottle of engine oil in HD ziploc bag
Soft cotton cloths for cleaning windshield and/or face shield.
Small spray bottle of water or favorite shield cleaner in ziploc bag.
OPTIONAL, and not recommeneded for everyone. Tow rope - 20' braided.
Practice at home first. This tip may not be for you. If you are not comfotable with this idea, do not try it. A relative of mine related using this tip to tow his Panhead Harley 20 miles home, after hitting a big dog back in the `70s. DO NOT TIE THE ROPE TO THE BIKE BEING TOWED!! WRAP THE ROPE ONE TURN AROUND YOUR RIGHT FORK, THEN BRING THE ROPE END UP TO THE RIGHT SIDE HAND GRIP, AND HOLD THE ROPE AND GRIP TOGETHER. If for any reason you feel your self losing control, release the rope and it will just pull away and you can coast to a stop.