The problem with uploading away from home is how do you edit them and keyword them first. This pretty much necessitates you use a laptop doens't it.
You can get gimp portable and filezilla portable but that means you need an internet cafe which lets you use USB devices - Some do, some dont.
this is something I am thinking about as I plan to go travelling for about 4 months at the end of the year. My current idea is just to do everything when I get back before I start work again (my holiday after the holiday so to speak).