My family of 5 adults & 5 children will be staying in Salzburg for 10 days in December this year, We would like to take a day trip to St Gilgen, St Wolfgang & Strobl not sure weather we should take a private tour or public transport as the youngest child is 3yrs. I'm worried it might be too cold for her, looking on Google maps there would be a bit of walking also the possibility of 10 of us getting on the bus. Would this be a problem, not sure how crowded the buses would be at that time of year. We would like to take the ferry between towns. Any suggestion would be appreciated.