Weight wise if you can't get your pack and gear to 40lbs something's wrong. We struggle with this a lot guiding, you need one outer layer and changeable under layers, three. You're not going to smell good when you come out.
Lots of OK freeze dried food on the market now, ration and eat less than normal. Bars are heavy and pick high sugar ones with fiber, I buy the fiber ones quick breakfast that warms you up with all that sugar. One plastic light large mug, one plastic spork, eat food out of the freeze dried pouches no bowl.
Plan to spend $600-1200 on your shelter, $600 on your bag and $800 on the sleeping bag, get an air cell 2/3rds mat, a small fly sheet for shelter, a Kimber to shave two or three useless rifle pounds, pack only five (expert) to ten (average) rounds ammunition. Get a plastic flexible water "bag bottle", they're way lighter than a nalgene, and a lifestraw to avoid carrying too much water.
Remember to pack like you're building an aircraft, EVERY ounce matters! As soon as the first "it's only half a pound heavier" happens they've lost the whole concept. I spent $1500 landed on my tripod for a carbon one and I'm still looking for lighter. It's not that you can't hunt heavier, but guiding I get all the client's inappropriate soggy gear and pig of a rifle to carry when they realise what we were talking about on the packing list. Every gram I can shave I do, and if I'm lucky and get a well packed mountain client, well the trip's a joy then and they get more opportunities. Your knees and back don't last forever but a Kimber even if you think there are better rifles, that's the single biggest weight savings for a hunter, gun and ammo. I like other rifles better but use Kimbers on account of weight. Go stainless as stuff to protect a gun is heavy.
