I am planning to go to St Moritz through the Bernina express from Milano. I have learned that the scenic view of the journey itself is nice. There are many travel agencies that operate for a day trip (round trip from Milano). They additionally show the Tirano city. I shall be traveling on June 10-13. We are four- husband, wife, and two kids, 12 and 13 years (one in a wheel chair)
My question is
1. Should I go with those operators for the day trip as they will hardly show anything in St Mortiz
2. Can we take the train on our own and stay one day at St Moritz. What can we see in that case there?
3. If we go by self, we are missing Tirano. Is that okay?
4. What would be the best way for this tour in terms of budget - as traveling in express both ways and spending one day or two in St Moritz will be expensive in comparison to the operated tour.