Two friends and I are going on our first elk hunt this fall, in Montana's Little Belt region. We'll be parking and making day trips into our hunting area each day. We know we'll need to carry the usual hunting stuff, plus food and water, in backpacks, but are not sure what types of backpacks we'll need. Should we look for something with pack frames, since we'll have to carry out any unlucky elk we encounter? Any suggestions as to types or brands?