Any experiences or feedback on the rucksack? I have typically used my sportsman bag as a smaller, more portable kit than my duffle. I really like the sportsman due the many compartments. But I am looking for something that may be easier to get around with for day excursions. I like the idea of the rucksack for a camera, laptop, water bottle and other sundries, but would appreciate any insights from current or former owners. Thanks.