I need to find one or two Mastodon songs that it would be feasible to play and sing at the same time, and in standard tuning... Help please?
Good luck, Brent Hinds' style seems to focus a lot on pedaling on open strings, making it harder to arrange a song for standard tuning.

Invert some chords and you might be able to pull of Naked Burn.
Q: Favourite Pink Floyd song?
A: The one where they get wicked high and play Emin and A for an hour.