While traveling, you can ensure you will be able to identify your photographs through easy to use, inexpensive, low-tech techniques. While high-tech methods, can also help handle image identification, even these can sometimes get a needed boost from more down to earth methods.
High-tech identification methods, while great, can sometimes fail, so every photographer, even a casual vacation photographer, should be familiar with the low-tech, failsafe photo identification methods I discuss below. During my recent trip to the Baltic region of Europe, my GPS, attached to my DSLR, died in Stockholm. I reverted to the low-tech techniques, which worked beautifully for me.