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From reading here, the simplest route appears to be:
Redirect 301 /Folder1 h*tp://www.domain.tld/folder1
Redirect 301 /Otherfolder h*tp://www.domain.tld/Otherfolder
Redirect 301 /Yet-Another h*tp://www.domain.tld/yet-another
without using any trailing slash after the folder name and withouthaving to individually redirect each page within the folders (thank goodness!).
If there's an even simpler way, I'd love to hear it, as the great folder changeout is actually not slated til Tuesday.