Sounds like an amazing trip--have a great time!
Have you used your tablet with an EHD before? I don't think I can do that, but maybe yours is more advanced than mine. (Which would not be a surprise at all, LOL. Mine is a cheaper tablet that I got specifically so I could use the PL App.) I usually load cards on my tablet's SD card, or sometimes in Dropbox.
This is what came to mind.
