After a long period of contentment with the gear I had, I recently purchased just one more lens (70-200 2.8L), which then forced me to upgrade my camera bag. Now getting about on longer walks is tougher. I find now if I'm going to be doing a bushwalk, I'm more likely to use my old bag and only take what I think I'll need (which can be a tough decision if you're not familiar with the location)