I use ultralight, ultra compact options when it comes to camping gear, so even when fully packed, with everything needed for a weekend hiking and wild camping, including my Marmot Tungsten 1P tent, Marmot Phase 30 sleeping bag, Klymit Inertia X-Frame Recon sleeping pad, a space blanket, full first aid kit (including a mirror, folding scissors and a penknife), Sawyer Mini water filter kit, Klymit Inertia Pillow-X Recon pillow, Marino wool night clothing, Alpkit Splitta folding table, Esbit Titanium solid fuel stove, 16 Strider solid fuel tablets (split into 8 each in two empty Berocca type tubes), two Titanium pots (450ml mug/pot and a 750ml mug/pot), Titanium spork, jet lighter, Helinox Chair Zero, 2 litres of water, kitchen roll, moist toilet tissue and a dry bag full of food, my Mountain Hardware Scramber RT35 outdry rucksack (about 800g empty) came in at just under 10kg. I walked over 18km last weekend, about a third of it up hills and could barely feel it on my back...So using a larger pack doesn't necessarily make it more comfortable to carry...My RT35 is extremely comfortable, even though it is not that big. So my advice would be to try before you buy!