Hey Kayaker72, I'm sorry if I'm a bit late and I see others already made great suggestions, but you might also consider looking into the Flipside 400 AW.


It's sturdy, has got lots of space but still is quite compact. I use it almost always now, no matter what I'm doing, MTB'ing, hiking, sessions, anything. The best thing about this bag is ofcourse that you never really have to take it off completely, unless you need to reach the space on the back, which I only use for pens, pendrives, little flashlight and mobile, nothing important fits there, really.


I even used it once as table for my lunch while standing on a narrow ridge with my back against the rock, great fun.


And ofcourse if the 400 is still to bulky, the 300 is also there and can also hold a 70-200.


Did I also mention that the tripod holder on the back of the bag is very good? It has handeld my rather heavy tripod many times without even moving! Even while on my mtb.


I wish you luck in your search.
JdeJ.