redirect_canonical breaks this plugin

There is a function called redirect_canonical that appears to be invoked early in the URL resolution process. Part of what it does is prevent 404s by matching against partial URLs. For example, if I visit /camp on my site, this function helps WordPress redirect the user to /activities/camping, which is one of my pages.

The problem is when I need to redirect /camp to somewhere else. It will never work because the Redirection plugin won’t fire before the user is 301ed to /activities/camping. This plugin needs to be revised so that Redirection redirects are issued to the browser before any redirect recommended by redirect_canonical can be sent to the browser.