Redirect after registration

Here is what I’m trying to do:

We have a site setup with a questionnaire. You need to be a member though in order to view the questionnaire. So I have the login/registration form on the ‘/questionnaire’ page, and that page set to ‘members only’. What we would like to happen, is once a member is registered, they are taken back to that page, but now see the questionnaire, instead of the login/registration form. (Instead of seeing the ‘thank you for registering’ message and the login form)

I’ve tried to following hook (http://rocketgeek.com/plugins/wp-members/users-guide/filter-hooks/wpmem_register_redirect/) which did properly redirect the user back to that page. But the problem is, they are not logged in, so they just see that registration/login form again.

Is there a way to redirect while logging the user in?

https://wordpress.org/plugins/wp-members/