Think RC is right in that the 29th & 30th were agreed upon but I'm being awkward and going on 28th and 29th as they are the only days I can make it.
One thing though, the Assey House is shut whilst they are fixing the heating so only Mill Cottage is open which is limited to six beds, three of which are booked for the 28th. Cherry Tree Cottage 200 yards around the corner will presumably be open though as well in case numbers are an issue.