RE: Elk hunting
You might take a look at BassPro's lineup, I picked a new one up for myself for this fall that includes a hydration bladder and shoulder straps and has buddy lock accessory incorporated on the belt. Looks like it will work great. Have always used a fanny back for elk hunting, always out of the way and doesn't weigh you down.
David/Mo
Ps 1000 to 1400 cubic inch size