The nearest canoe hire to Le Couvent is at Tarassac, just 20 minutes’ drive from Hérépian (west on the D908). There are a variety of options, of which the easiest is to park your car at Tarassac and they will take you by minibus up to Le Poujol sur Orb. You can then take your time canoeing back to Tarassac. There are a number of rapids on the river but this stretch (Le Poujol to Tarassac) is the gentlest. They are open every day in summer. Book in advance to avoid disappointment.
The website is : www.canoe-tarassac.com
They also have a facebook page : http://www.facebook.com/pages/Cano%C3%AB-Kayak-Tarassac/153438778192628
Google + shows the location as follows : https://plus.google.com/117260129580177599077/about?hl=en&gl=uk
Just click on the map and it will take you to gogle maps, where you can zoom in and out.