" Wine and roses". There was a movie titled "The days of wine and roses". In this title, it means romantic and nostalgic.
In Maclean's passage, it just means that the air was perfumed with the smells of wine (an alcoholic drink made for fruit, usually grapes) and roses (a flower prized for its beauty and fragrance).
Rolling landscape means the land you can see has gentle hills - not mountains, not plains, and not high steep hills.