[chrishajer]

I would back up your database first, just to be sure.

If you delete all the files, nothing happens to WordPress.

If you delete all the bb_ tables, that does not affect WordPress.

I’m not sure how you get rid of the bb users from the wp_users table. But once you delete all the bb_ tables from the database, you should verify that you can log in to WordPress admin fine. You might want to manually delete the bb users from the wp_users table, but you’d have to be careful if they created any content in WordPress that would be keyed to their id.

I think this covers integration:

https://bbpress.org/documentation/integration-with-wordpress/