In reply to MikeTS:
I've an f-Stop Kenti - I tend to use it for walking, scrambling and the odd MTB ride. It's narrow enough that I can fit it through whatever my shoulders make it past which is my main bugbear with most camera bags.
Can set the camera up either side so you can sling the bag around on a single shoulder strap if you don't/can't put it down. Works fine on the side of a hill, or at a belay stance. No problem fitting two bodies and a few lenses in. Carries well when weighted. Mine didn't come with a rain cover (using an old one) but it has worked well in heavy rain without it. Material has not been treated nicely and it's still going well.
But, room to spare on at the top with the roll closure can be minimal. Waterproof, Primaloft layer, some food. Few stow pockets on the back panel and the right hip.
As a day pack it's great - it's my day to day work bag with camera on one side. Looks like a normal bag and doesn't attract too much attention.
I also have an Evoc photo Scout -I've not got on with it so well and found it unbalanced when the side pocket was loaded. Back access is nice though, bit more storage on top and the padding is stunning. If you're interested I'd probably pass it on.
Post edited at 10:17