memory cards in the mail - protection?

[jay_warner]

Yes, I know that rule from the days of (gasp!) film.  Also, never send them all in one pkg.  I’m going to be in Costa Rica, with people who may or may not appreciate the needs of photographers to immediately back up their work.  I’ll check around about the thought of an internet cafe.  The State Dept. web site rather discourages the idea of taking one’s own computer, unless I carry _all_ my gear everywhere I go and stay in groups of friends.