Planning to take the bus next week-- I've heard it sells out, but wasn't sure if I needed to buy tickets electronically online, or if I should just buy them in person a day in advance?
We rode the bus to CK. The train to Ceske Budejovice and then bus to CK would be more comfortable.
http://jizdnirady.idnes.cz/vlakyautobusy/spojeni/
There are several trains and buses leaving every day.