but now every time I head off the beaten path (when not camping) I carry the same pack with mostly the same gear it has several multi use items that are selected based on the possibility of having to stay an unexpected night while still keeping wieght down.
This is my approach too. I've found as I've gotten older and with more responsibilities for kids, parents and work, that logistical planning is major head ache often preventing me from going.
I now keep a well stocked, unpadded fanny pack in the back of my car. It contains the set of things I would need on any backpacking or skiing trip or any day hike or hunting trip. Yes, there are few things here and there I might weed out to suit one trip or another. And on trips where ounces count, I'll go through it with a fine toothed packing list. But generally, it's just grab it an do. I simply drop it in any of the 3 larger packs I own and toss it on by itself and I know I have the essentials covered.
EDITED TO ADD: This thread combined with some down time has prompted me to update my web page on this topic. Thanks for the discussion. Comments welcome:
http://home.comcast.net/~pinnah/DirtbagPinner/essentials-list.txt
Updated and clarified packing list:
TRAIL POUCH - Stuff I often use while on the trail
+ Map (typically moved to pants pocket)
+ Compass (in my pocket when off trail)
+ Altimeter watch (moved to wrist)
+ Lighter (typically moved to pants pocket)
+ Whistle (typically moved to pants pocket)
+ Sun screen
+ Dermatone
+ Bug dope
+ Ibuprofen
+ Iodine water purification tablets (water filter is carried separately on some trips)
CAMP POUCH - Stuff I usually only need in camp
+ Headlamp
+ Toothbrush and toothpaste
+ Antihistamines
+ Toilette paper, hand sanitizer, disposable lighter (these are kept in a ziplock bag)
+ Headnet
+ Leatherman Squirt PS4 (for small pliers and scissors, mainly)
REPAIR KIT - Carried in a separate zip lock inside my camp pouch
+ Spare Fastex 2" buckle (for backpack hip belts)
+ Section of adhesive nylon repair tape (for down jackets, bags and tents)
+ Heavy polyester thread, standard needle and curved upholstery needle
+ Spare stove filler cap (I typically carry a Svea 123 and this is the only part to fail)
+ Selection of nuts and bolts (for pack frame repair)
+ Spare batteries (for headlamp)
+ Small roll of duct tape (wrapped around a cut-off disposable pen body
EMERGENCY GEAR - Stuff I hope to not need
+ Spare knife
+ Folding saw (Carried October through April)
+ Mylar aluminum bivy sack/shelter
+ 2 Powerbars (emergency food)
+ Coil of parachute chord
MINIMAL FIRST AID KIT (mostly focused on stopping bleeding and attending to feet):
+ Selection of gauze pads and band aids
+ Butterfly tape and small roll of bandage tape
+ Gauze wrap
+ Alcohol wipes, iodine wipes, small tube of triple-biotic ointment
+ Disposable razor (shaving shins)
+ Pre-cut moleskin and bottle of Skin Shield (for blisters)
+ Nail clippers, fine tweezers (splinters), Leatherman PS4 (scissors, pliers)
+ Spare disposable lighter