Is is possible for guests to be able to view Resource pages, but not Forum pages? I have experimented with the permissions on a demo installation, and it seems the 'View' permission includes both routes.
My forum is not viewable to guests (currently guests receive an "error_with_login"), but I wish for guests to be able to view resources.
If you remove the general "view node" permission rather than the general "view" permission, then users should still be able to view non-forum pages which would allow access to the RM if you configure that.
I was disappointed to discover that, upon finishing installation, the RM 'view' permission for at least three of my user groups had been set to 'Allow'.
I had wanted to launch the RM with some content, rather than for a new menu item to appear and for their to be no content available.
Now, I did anticipate that this permission behaviour would occur for the Registered user group, so I did not think I would be caught out when I swiftly changed it after the RM had been installed. However, I later realised two of my other user groups had the 'view' permission set to 'Allow'.
I do believe the installation should assume nothing about how the add-on is to be used.