Rob,
This thread comes up about 27 times a year but it's because it is such a frequently asked question that I have gone an inventoried my base hunting pack. The contents are are follows:
Most importantly my common sense is packed first...that tells me I'll need the following in the field:
Optics
1. Binocs: Steiner 8 by 30 Night hunter
Water
1. Camelbak 102 ounce hydration bladder
Navigation & Communication
1. GPS Garmin Rino 530, includes a FRS 2 way radio, Weather Service Radio, altimeter, digital compass and GPS capability
2. Cammenga Tritium Military compass
3. Waterproof Topo Map of area I’m hunting
Cutlery
1. Knives of Alaska Light Hunter Combo, includes a skinning/field dressing knife and a small detail caping knife.
2. Small Hatchet
3. Hack Saw blade wrapped in Duct tape handle
4. Diamond based sharpener tool
5. Gerber model 700 Urban Legend multi-tool (Leatherman)
First Aid Kit
1. Kit for emergencies, including sutures, pain-killer and the normal first aid stuff. Keep it small.
Emergency Bag
1. One heavy weight plastic trash bag (rain poncho, water collection etc.)
2. One unbreakable signal mirror & Whistle
3. MSR Miox emergency water purification system
4. Fire Starter (commercial fire tabs or petroleum soaked cotton balls)
5. Magnesium based fire starter and disposable butane lighter
6. Foil based Space Blanket (emergency warmth & lay out quarters on after field butchering)
7. 50’ Para cord & Military poncho for shelter
8. Heavy Duty Needle/Thread
9. 30’ 3/8” rope and mountaineering pulley wheel
10. 1 sealed baggie containing moist baby wipes
Food
1. WWII vintage canteen cup w/ attached cook stove, & fuel tabs
2. dry soup & hot chocolate powders
3. Trail mix, nuts, candy bars etc.
Miscellaneous
1. License, tags, waterproof pen, pencil & paper
2. spare batteries & bulb
3. extra bow string & finger tab
4. small roll surveyor’s tape
5. Digital camera
6. Zippered cotton pillow cases or Game Quarters Bags
Optional (Depending on climate, conditions & activity)
1. Tripod and Spotting scope
2. Packable Rain Gear
This "stuff", including the full load of water loaded into my Badlands 2200 pack tops out at 26 lbs. You don't want to hump too much more than that all day in the tall country. I disagree with the opinion expressed above that too much is better than not enough. My experience is that too much is a very bad thing and will hurt you more than help.
Oh yeah, the Badlands 2200 has a built in Flourescent Orange Meat shelf (about 2 feet square), in case I want to be found.
In this photo, I'm wearing all of the above listed items at 12,500 ft in the Colorado Rockies: