Hello Doizouphock66
Rochers-de-Naye is a great mountain excursion.
Note, Chateau de Chillon is not in Montreux. And the train ticket Lausanne to Rochers-de-Naye is not valid for the bus to Chateau Chillon.
You would have to buy two single tickets:
- Lausanne - Rochers-de-Naye
- Rochers-de-Naye - Lausanne via Veytaux, château de Chillon
Note the spelling of Montreux.
Kind regards,
Roland