When I went to Belize, I needed my survival gear (including FAK) to fit in a relatively small fanny pack. Something that small was the only realistic option, given the way we went about doing things - spontaneous kayak adventures, spur of the moment bike rides, etc.

Building a proper FAK for travel is not rocket science. This site provides a lot of good advice for a FAK, and then you modify a little for local conditions. Regardless of how well equipped you are, you're probably going to be lacking. You have to have the knowledge to improvise.

Also, I find myself taking fewer risks when I travel. For example, in the U.S., I might kayak out a half a mile and then jump into the water. Heck no, I'm not doing that in another country.