How to use these night counts
Treat the practical minimum as the point where a route can work if arrivals, departures, weather, and transport are favorable. Treat the safer range as the better planning band for families, older travelers, first-time visitors, or private trips where comfort matters.
A transfer day is not automatically a sightseeing day. If a train, flight, luggage move, hotel change, or mountain road sits in the middle of the day, the usable sightseeing time may be half a day or less.