These look pretty cool. I waw looking at them at SW and they have a roll-away shelf that is blaze orange and can clip to the top of the pack and be used as a meat haulker. How much can these things carry? I tried putting my daugher in it and she weighs about 45 lbs- no problem, but I wonder if it could theoretically haul out a boned deer or deer quaters. What are your thoughts, the good, the band and the ugly? Any real time criticis?