How to get to Shenzhen from Hangzhou ? Also how would i be able to check the availability of buses ?

Hi,

Wrong timing ! wrong timing !! wrong timing !!! MAY 1st holiday's.

Its put a dent on all my travel plans and i am now in Zhejiang province and would like to head to Shenzhen but cannot as there are no trains available, airfares are through the roof and with no other mode of transport i would like to try the long distance bus service from HZ to Shenzhen. Could someone guide me with details about how to check availability and also how many hours does it take to do the same journey. Also, is it advisable to do the same journey. Is there any late night buses that i could take and sleep along the journey. Schedule the timings would be highly appreciated !

Regards
Ahil Rosa.