I would advise a pack over 5,000 cu in for 2 to 3 day trips and packing out any kind of load (meat). If you ever shoot deer or elk sized game you will thank me! It will save you several trips...even with a buddy helping out!
I used and abused a badlands 2200 for years and tried it on one overnighter trip. One time taught me not to ever try it again! My gear, food, rifle, etc barely fit and it was loaded to the hilt. I ended up getting a 6x6 bull the next day and had no room to take any meat on the first load. I also had a sore back and shoulders because the pack wasn't desiged for anything over 40ish lbs! Needless to say I switched to my 6,000 cu in pack for the next 3 loads....shoulders, back, and legs were happy! If you get a larger pack you won't regret it because you can always cinch down smaller loads....especially with packs similar to Kifaru.