You are most welcome David. You can use Yoast for Wordpress for handling rel=canonial.
Here for more: https://yoast.com/wordpress/plugins/seo/#canonical
Here you go for implementing 301 permanent redirection using .htaccess file on Apache server(Linux hosting):
If you are on a Windows server, here are the steps for 301 redirection:
http://www.iis.net/configreference/system.webserver/httpredirect
301 redirection is definitely faster than rel=canonical and almost same when it comes to passing on the SEO goodies to the canonical page. With 301 in place, in this case with the URLs mentioned by you for example(suppose, the author page is redirected to the homepage via 301), no one will be able to see the author page as it would take you to the homepage but with rel=canonical in place, everyone will be able to see the author page and its just that the search engines like Google will not index the author page as the cononical or the preferred page would be the homepage. So, ideally, you should be going with the rel=canonical implementation here. Hope it helps.
Good Luck my friend.
Best regards,
Devanur Rafi
