It's probably not that big of a site, so yes, I'd think it'd fit on a DVD just fine.

If you're just using it to browse a site while you're offline (off the internet) I don't see a problem with it. I'm no lawyer mind you. But in earlier versions of browsers you can tag a site as available when you're offline and many "web acceleration" tools pre-fetch web pages. So I wouldn't worry about it.

JB