Transport from Longmen Railway station to Shaolin Temple

On the west of Longmen Railway Station, there is Longmen Transportation Center operating buses to Shaolin Temple departing at 09:00, 10:30, 14:30 and 16:30. The ticket fare is CNY 35 and the duration is about 1-1.5h. Is this available in Apr during the Qing Ming Festival?
I also need to get direct bus back from Shaolin Temple to Longmen railway station. What time is the last bus?
How do I buy the bus tickets in advance?