My first elk hunt was done with a pack that was way too small and unstable for heavy loads. I upgraded to a good pack from Eberlestock and it served me quite well for 5 years. Virtually indestructible as I really beat it up and it remains without a tear. However, it was a little heavier than some packs today.
Food/snacks are one thing I'm always changing. I've eaten so much trail food. There are some I just don't like that much anymore -granola bars/trail mix- it's still good if you're really hungry. Try to figure out what you'll need daily and don't way overpack.
Here are some of my personal favorites: Dried fruit, jerky, tuna and salmon, precooked bacon, an homemade granola with dry milk.
To put it simply, great gear is pricey but there's a good reason for it. It actually works better! As a guide, I'll wear out some of the best gear available. It needs to work as hard as you do. Don't compromise your hunt with gear that doesn't work the way you need it to.