I have been carrying a 35lb, 70L pack for years and due to getting older (40) and aching shoulders I want to shed some weight. I am looking at the Osprey Exos 38 &48. I will be carrying a Sea to Summit small sleeping pad, a Tarptent Contrail and a 2lb summer sleeping bag. Will these items fit in the 38L pack with room for my MSR Pocket Rocket small Titanium pot, four days worth of food and clothes (one pair of socks, one pair of underwear and tights for around camp and one northface thin compressable coat? I want to go as small as I can!