I use an internal frame for scouting and short hike hunts. I prefer an external for long duration hunts and where the probability of pacing out meat is high. An external frame seems to be more stable and easier to strap elk quarters to. The major downfall of the external is if you are doing major off trail travel in thick country, since the frame grabs brush, which is more avoidable with an internal frame pack. As far as brands go, figure out what you can spend, then see what feels comfortable and fits you for that price range. The badlands and eberlestock packs are great, (I love my hypervent Badlands daypack) but there are many other great packs on the market, and they don't have to be camo to pack meat, the granola backpackers at REI do have some great backcounty gear.