Try importing any of that into blockchain and see how things work out.

-snip-
These backups must've been done around two months ago, meaning I had my old password then. If I simply copy the multibit.wallet file over my current one would it work? Or if I have access to the private key backups could I just import them into a new client and bypass the whole password process?
Any and all help is appreciated

Make a backup of your current wallet file just in case and try one of the older wallet files. This should work.
See here for reference:
https://bitcointalk.org/index.php?topic=305896.0