Originally posted by Gareth.Ig I'm not a big fan of backpacks unless I'm hiking. I find the satchel or messenger bag style best, although it does require limiting the size and scope of kit you are taking with you, both due to size and weight. I'm looking for a day pack currently to accommodate the Bronica GS-1 as well as my K5. The bronica is massive compared to the K5 and a satchel definitely doesn't cut it.
Well....I have a LowePro combined trolly/backpack, and that's ideal for transporting a *lot* of gear, and works in airplanes - but not so good at using on location. I think I spent approx USD200 on that.
In terms of accessibility - when I don't care about looking like a dork
- that which I have found to be most useful is a LowePro waist pack - I think that it's an Orion AW Waist Pack, the one where the top cover unzips and "folds outwards" for easy access to the gear, but it and I go back so long that I've forgotten the formal name. The bag sits comfortably on the hips - in front for access to equipment, and swings to the back and out of the way for trekking. The one I have easily holds body w/grip + 4 of the long DA* lenses and other odds and ends. I think I paid around USD100 for it, then.
I think that this bag is discontinued, though, but this is my favorite bag for hiking - much more practical than backpacks, in terms of accessing the gear, the weight of the camera is on the hips and not the shoulders - plus, it allows for an independent small backpack for a snack and water, etc.
For mucking around it a city, I use a LowePro event messenger bag, that almost looks discrete and holds an iPad and a camera - runs what, 60-70 USD, or so?