How is the transportation from Taipei to Cinjing Farm?

Hi,

Im planning to go Taipei on 1st week of April 2011. I want to visit Cinjing farm, is it far from Taipei? How is the transportation, can we use public transportation or we must hire a mini van? If we go in the morning (8 am), and back in the evening (5am), will it be enough or we should spend 1 night in Cin Jing Farm? What is the weather in April?

Thank you in advance