Mystery Ranch has sales from time to time. I have the Pintler, great pack that's relatively inexpensive. As for trying gear on/out in person, not many options around here.
If you're just hunting SoCal I'd say you're fine, but it's pretty miserable turkey hunting in a rare rainstorm here with no rain gear.If I can piggyback on this thread, I was reading an article in a hunting magazine where it said not to skimp on four items: boots, backpack, glass, and raingear.
Raingear was a little surprising -- is quality raingear something I should be investing heavily in? Doesn't seem as essential here in Southern CA, but not sure about other states. Plus I haven't gone on an extended backpack hunt yet which is my goal