In reply to mark20:
In laws have a narrow boat, so we've had several weeks on it over the years. Lots of nice canals, lots of nice scenery and lots of nice pubs. Don't underestimate the awesomeness of puling up to the end of the beer garden, walking to the pub for an evening meal and drinks and then walking the 20m or so back home.
You can get maps that show the canal and a narrow strip either side. They have helpful info, such as by bridge 123, there is a good pub and a village shop down the road. If you have internet, you can google for the same. Its pretty easy to find shops selling croissants, fresh bread, coffee, cheeses, fine wines etc within walking distance, with a bit of effort.