This indeed looks promising, unfortunately it gets stuck after a few tens of MBs for me (there is also an active issue for that). Anyway, if the developer manages to fix that, this might be the least painful solution.
Well, after being burned with the Evernote's decision to go to the servers for nearly everything I would really like to test on the full set of notes to also catch performance problems depending on the number of notes... The idea with PDF is however worth considering, thanks.