Jacob,
The reason the packs you mentioned are so expensive is they carry a HEAVY load like an external.
If you don't mind making an extra trip back to the truck where you have a freighter frame to carry your heavy load, you can get by with most of the daypacks mentioned. They are all pretty decent with 30# in them, but you put #100 pounds in them and it is going to make you wish you spent the extra money...that is said with experience. I was young and had more brawn than brains at one point too
If you can find an OLD Coleman frame Schuh pack, that might be your best option from a cost perspective. The newer Remington branded ones broke a LOT with moderate loads.
Find a used Cabelas Alaskan and make an extra trip and hunt out of an Eberlestock X2. If it were me and I had a year before I
really needed it, I'd find a way to put an extra $25 a month into my kitty and get your Stone Glacier. Look Kurt up, maybe he needs help in the shipping department!