My mother attended a Show House recently across Lake Ponchartrain, across from New Orleans.  Here are her notes. A recent tour of Southern Living’s Louisiana Idea House yielded some surprises but not many ideas.  Southern Living calls Bayou Bend, located in the Terra Bella development outside of Covington, Louisiana, a “quiet cottage”.  Granted, its location is quiet, but its size is not what I’d call a cottage.  It has 4 bedrooms, a study, mud room, a garage apartment and I didn’t even count the number of baths!  Designers Grace Kaynor and Vesta Fort did feature works by local artists, though.  Large cypress doors open onto an entry with a tile…