[chrishajer]

Instead of this WordPress function:

<?php wp_register(); ?> 

You would have a link to bb-login.php. Then bb-login handles the whole thing. In the login form, you would add that hidden form field to redirect then after login, as explained here.

https://bbpress.org/forums/topic/heres-a-trick-to-redirect-user-back-to-topic-after-login#post-14268