Would the notepad app notes be backed up on the Amazon servers? I don't have that app, so I'm not familiar.
EDIT: Well, it turns out I do own this app. I purchased it early in 2011 and forgot I had it. I found the help pages for the app
here and
here. The app has a backup and restore option but in this case if the backup files aren't also copied to a computer, they will be lost with a reset.
I tried saving a test note to see if it would show up with my personal documents and so far I don't see anything. So geekmaster, it looks like your plan might be the only way to help.