Parade on MSN: Michael Crichton's 'Airframe' ranked the best book to read on a long flight this travel season
Michael Crichton's 'Airframe' ranked the best book to read on a long flight this travel season
Yahoo: How Michael Crichton invented the medical drama – and everything else on our screens
How Michael Crichton invented the medical drama – and everything else on our screens
MSN: Michael Crichton's 'Airframe' ranked the best book to read on a long flight this travel season
I believe you should use Travels for your root folder name. The folder is a photographic chronicle of your travels, as you would say, and the pluralization reflects the further division into different locations. I think this would be more correct than calling the folder travel, although travel could also work if you looked at the collection of pictures as a single entity.
In this case "travels" is likely correct, and possibly more so than the singular version. The implication is that the person being addressed is (or will be) engaged is some sort of extended traveling (method does not matter) and hence more than one "travel". For the case of a simple trip, however, "Have a safe trip" would be more idiomatic. And note that using the plural of "travel" is ...
I suspect "globetrotter" might fit, even though the provided definition "a person who travels widely" doesn't specifically call out air travel. The set of people who are likely to be called "globetrotters" who do not travel by air on a regular basis is likely vanishingly small.