I'll be in Prague in late May and have decided to make a day trip to Kutna Hora on my own--Rick's book gives good guidelines, and I fear taking a guided tour would leave me feeling rushed or unsatisfied as I love to wander and can get caught up in all kinds of things.
I plan to take an early direct train (on a Wednesday or Thursday) and start at the Ossuary in Sedlec, then either the shuttle or bus to Kutna Hora and see various things there like the silver mine, have lunch, etc and then take the bus back to the main station for the return trip, around 5 pm. Sounds like buying my tickets at the station is fine, no need to buy in advance? How crowded is it likely to be in late May? Any other pointers from someone who's been there recently?