You'll need to try to target about 60 lbs max. I like to stay below 50 for a 5 day stay. I use iodine tablets to purify the water with nutrilizer tablets to take away the bad taste because there isn't so much to carry. Be sure to get a good bivy that will withstand hard wind and snow load. A cheapy can spoil your hunt if the weather turns bad. I take MRE's and lots of snickers, paydays and or power bars. Also the different trail mixes are pretty good for a change.
My great wife makes me a bunch of 1/2 pound packets of beef jerky too.
Most importantly water is crucial. Keep lots of pure water prepared ahead of time and stay hidrated. Way up high you can sweat more than you realize and get dehidrated before you know it so drink lots of water even if you aren't thirsty.
It seems like I don't get very hungry or thirsty up there but I make myself drink and eat regularly regardless. I think just being tired from all the hiking makes me too tired to feel hungry.
Happy hunting!