If you choose not to use WP-Juicebox, I would recommend using the baseURL method of embedding (documented here, as you are already doing). It allows you to upload your complete gallery folder (not just the contents) to anywhere you like on your web server. You would enter the embedding code into the body of the WordPress page (or post) ensuring that the method of entry is 'Text' rather than 'Visual'.
Your gallery currently displays the 'Config XML file not found.' message because your gallery uses the following code:
baseUrl : '/matt_blog/wp-content/JuiceboxGalleries/DaraghNessaWedding/',
... but the gallery does not seem to exist at that location.
You are seeing the 'Config XML file not found.' message only because WP-Juicebox is still activated in your WordPress installation and the web page is loading the 'juicebox.js' file from the plugin.
Your own gallery's embedding code contains the line:
<script src="/matt_blog/wp-content/JuiceboxGalleries/DaraghNessaWedding/jbcore/juicebox.js"></script>
... but there is no 'juicebox.js' file at that location either.
Make sure that you have uploaded your complete gallery folder to the correct location on your web server.
Also, if you choose not to use WP-Juicebox, you should deactivate it from the plugins menu as loading two different versions of the 'juicebox.js' file on the same web page (which may happen if you leave the plugin enabled and manually embed a Juicebox gallery of a different version) may cause problems.