Go as light as possible. Avoid Cabela's, Coleman brands etc. OK quality but very heavy and bulky compared to other brands out there from better outdoor companies. With current lightweight backpacking gear you can carry a pack that weighs less than 30-35lbs that will have you covered for 5 days (not including your rifle). I have included only what you would be carrying and not what you are wearing... boots etc. Some of the weights are specific, but many are estimates. I have weighed by pack loaded exactly as below minus food and water and it comes in right around 25lbs. Remember this assumes that you are going solo. You can lighten-up a bit if hunting with a partner.
Pack: Internal frame with at least 70L capacity (go with a good suspension because when you add in 50lbs of meat you want to be able to carry a 75lb pack with some degree of comfort)
Good Brands: Gregory, Osprey, Mountain Hardwear, Lowe Alpine
My Choice: Gregory Baltoro 75 - 5lbs 14oz
Tent: Tarp Style
Good Brands: Black Diamond, Marmot, Sierra Designs, Go-Lite
My Choice: Black Diamond Beta Light - 1lb 8oz + 8oz ground sheet
Sleeping Bag: Go with down for light weight and compressibility (compacts much smaller than synthetic bags)
Good Brands: Sierra Designs, Marmot, Mountain Hardwear, Montbell
My Choice: Sierra Designs Vapor 15 degree - 1lb 12oz
Sleeping Pad: Inflatable Type
Good Brands: Therma-Rest, Big Agnes, Insul Mat
My Choice: Big Agnes Insulated Air Core - 1lb 8oz
Cooking Gear: Light Isobutane Stove and Single Pot
Good Brands: MSR, Primus, Jet Boil, Snow Peak
My Choice: MSR Pocket Rocket - 3oz, Single Pot - 4oz, Isobutane Canister 8oz, Spork 1oz
Water Purifier: Pump or gravity style
Good Brands: Katadyn, MSR, First Need
My Choice: Katadyn Base Camp 11oz
Clothing: Good layering system
Good Brands: Patagonia, Marmot, Mountain Hardwear, Sierra Designs, Mammut, Lowe Alpine, North Face, Smart Wool, Columbia)
Waterproof Shell Jacket and Pants- 2lb
Midweight Fleece Jacket - 1lb
Down Jacket (adds warmth to sleeping bag or while glassing) - 1lb
Baselayer Top and Bottom - 1lb
Extra Socks - 4oz
Gloves - 8oz
Hat - 4oz
Gaiters (will keep your pants dry in snow or morning dew) - 8oz
Accessories:
Headlamp: Princeton Tec, Petzl - 3oz
First Aid Kit - 8oz
Toiletries - 8oz
Misc - Batteries, Maps, Compass 1lb
Hunting Gear:
Knife and Light Saw - 1lb
Spotting Scope - 1lb
Binoculars - 1lb
Lightweight Rangefinder - 8oz
Cord/Game Bags/Plastic Storage Bags - 1lb
Total Weight = 26lbs
With food and water you can squeeze in at right around 35lbs, especially if you can refill your water frequently. Obviously your exact weight will vary depending on your gear choices. With the above set up I am pretty comfortable through the first week in October up to about 10,000ft. Weather where I hunt typically is around 10-20 degrees at night and 40-60 degrees during the day. The down jacket is essential for glassing, preparing meals, or anytime you are standing still for extended periods of time. It also adds warmth if worn inside you sleeping bag at night. Gaiters can be a lifesaver for keeping your pants dry when there is dew/rain on the grass/brush. They will also keep you and your boots dry when walking in snow. I also carry trekking poles which help a lot when climbing steep terrain or carrying heavy loads. They are used to pitch my tarp and can double as shooting sticks. I am in process of writing an article on lightweight outdoor gear suited for backpack hunting.
NEVER pay full price if possible. There are some great websites that will save you at TON of $$$. Here are a few of my favorites. Shop when they have sales or sign up for their mailing lists and you can often save additional money.
Sierra Trading Post - Great Deals. Great Brands.
Camping Gear & Outdoor Gear - Outerwear & Outdoor Clothing from Campmor.com
MountainGear.com; Outdoor gear and clothing for climbing, hiking, skiing, camping & backpacking.
DepartmentOfGoods.com: Discounted Outdoor Gear, Skiing, Snowboarding and Hiking Gear from The North Face, Patagonia and Oakley.
REI-OUTLET.com: Deals, Discounts & Bargains on Outdoor Gear, Clothing and Equipment for Camping, Cycling, Fitness and More
Best of luck, hit me up with any questions - James