Well, I have an embarrassing
collection of camera bags, most of them Think Tank and Domke, and many of them never used (the true sign of a bagaholic 
). They all seem important to own and keep for various situations which have yet to materialize.
When I stop to consider which is my favorite bag, I come up with a surprisingly long list of the bags I have.
However, when I actually consider which is my most USED bag, I am always surprised to discover it is the lowly Think Tank "Change Up". It seems to be just the right size for lugging around on vacation day walks, and I like being able to change the way I carry it to distribute the load during the day. On travel days, it tucks neatly into my carry-on roller so it isn't a problem with airline restrictions. I use it without the removable padded insert shell so it conforms better and is less bulky.
Even when using it as a shoulder bag, I usually keep one of the wide belt sections out as an "attach point" for the shoulder-strap which I find more comfortable. I can also keep a small bag for P&S, cellphone, and other small stuff on that belt section. If it gets too heavy on my shoulder, I simply deploy the remainder of the belt and shift the weight to my hips, using the shoulder strap just to keep it from sliding down my legs as I walk (too much gut ... not enough butt).
The "Change Up" works great for me...
Enjoy your trip!
-howard
