A friend of mine is headed to Cannes soon, and wants to get away from crowds on a great five or six-hour walk. Trees are required. Villages are optional. Where can she get to by bus or train? The Iles Lerins look good initially, but I'm worried they're just mobbed with tourists, being a primary tourist attraction. Is there somewhere northwest which can actually be reached by transit? What about walks out of Grasse, Le Trayas, or Vence?