Available accommodation is looking quite scarce.
Myself and Ian M have booked this hotel in Honfleur
Bed and Breakfast Chambres d'Hôtes A L'ecole Buissonniere , Honfleur, France - 269 Guest reviews . Book your hotel now! - Booking.com
There are a few rooms left and a choice of some other hotels in town and cheaper 1.5km away.
However this where it now gets difficult. I can't find any available accommodation in Ouistreham or Caen or anything in between but there are a number of camp sites.
Carentan is also proving quite difficult to find anywhere and The hotel in Cherbourg we all stayed at in October is full with two large groups having booked all the rooms !
I will check marinas next week to see if we can actually find a berth as it would appear this sort of trip should have been planned 12 months in advance !
If your looking for a retirement business you might want to consider a B & B on the Normandy coast