Hey Josh
Yes, that's about the right range for a 2-3 dayer, but it depends on what gear you are carrying. Sierras = bear canister(in most parts) and I would go with the 70L or bigger, and also if you are winter camping with a tent, a 0-15 degree bag, avi gear, snowshoes, and crampons. I tend to pack heavy (45 lbs) and don't mind the weight for certain comfort items.
My suggestion would be to go to REI and let them fit you first. Then load up the pack you choose with your approx. gear weight (they have those bean bags and pillows in the store) they will help you with that also. Now just walk around in the store for a while....not 5 min, I mean like 30 min. See how you feel.
If you like it, buy the pack (or find that model & size online cheaper) then load your own stuff in it. (Your gear will feel better than the beanbags!) Make sure it all fits, take your dog for a walk with it on, do a trial day hike somewhere locally. If it's all good, then you're set. If not, start over. It can be a process, but it's worth it. An uncomfortable pack can ruin a trip!
REI Santa Ana does have a great selection right now.
Stacy
ps re: the pm...traffic around here SUCKS all the time. and I just work in Carson!
