These pages are undergoing maintenance. In the meantime, useful information can be obtained by searching "canal routeplanner" in a search engine such as Google and using it in conjunction with the map on the main "Routes" page. Also the following links may be of some help:-
http://www.canalholidays.com/grand-union-canal.htm
http://shop.rivercanalrescue.co.uk/RoutePlanner/CanalRoutePlanner.aspx
http://www.waterscape.com/things-to-do/boating
In any event, contact your skipper to discuss your proposed route with him/her