Right now I have a small camera bag that I'm pretty happy with. I'm flying next week for business and need to take a laptop with me, which won't fit in my camera bag. I could get a small case for my camera and put it in my purse, but I probably couldn't fit my extra lenses. Or, I could buy a camera/laptop backpack that would fit everything (and hopefully still count as my personal item for carrying on the plane). I'm leaning towards buying the backpack, but I'm having trouble justifying the expense. What should I do? Thanks for your help.