Hi Mike
We were in Barfleur last year, April...albeit by car, but I had a good look around. I would suggest you pass the massive light-house to starboard, about 2 nm North from Barfleur enroute from Alderney, and actually proceed into the little harbour. You can chuck the pick in just past the pier-head (does not dry out)on the right and have your lunch etc.
Here's a picture.....
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