I'm also not sure what you plan to do with the laptop but there is a very light alternative if you will have access to regular computers such as in Libraries.
A 2 or 4 Gig USB "Thumb Drive" will hold a huge number of word processing files and complete copies of "Portable Open Office" (a free MSOffice work-alike, that is fully compatible with Word and Excel files) and "Portable Firefox" (a free Internet browser) and "Portable Thunderbird", (a free Outlook Express-type E-mail program). These programs are all available as no-cost downloads ( one source is http://johnhaller.com/jh/
) and work very well.
You can plug the USB drive into any available desktop or laptop and use it as your own personal self-contained drive with access to all of your files, your own word processor and your own Internet and E-mail programs.
These drives are extremely small and light, durable and cheap at about $50.