Got fitted for packs today. Arc Teryx was out of my price point so I ended up walking away with a Gregory Z55 after trying on a lot of packs and walking around for quite a while (the outfitters place had a rock ramp and other stuff which was helpful). With regard to shoes, can I just wear a pair of comfortable sneakers or running shoes?
Gregory makes excellent stuff. As another poster noted, I wouldn't wear tennis shoes or sneakers if you're actually going to be on any terrain that is questionable - even if you're used to carrying a heavy pack. If you're not used to carrying a heavy pack, don't wear sneakers on any terrain. This doesn't mean you have to get a pair of Norwegian welted, six pound boots. There are plenty of options in the lightweight, supportive boot category. Look into La Sportiva, Scarpa, or maybe most appropriately for your needs, Kayland.