I use the Crumpler Base Park backpack and it's great. It has a separate camera section in the bottom and although it was smaller than I expected I have just learned to take less with me. It fits my 7D and a 70-400 f4l in perfectly though. There's loads of room in the top with a few handy pockets and side straps dotted about. I can carry enough food, drink and spare hats/gloves/coats for me and my two and four year old to last all day.
Hope this helps.


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