Yulong River Raft and Li river Cruise

I will go there in end April. I want to raft on Yulong river from Baisha to Yangshuo. What is the earliest time I can get a raft in Baisha and what's the price of the raft? How long is the bike ride from YS to Baisha.

If I want to do the Li river cruise from Yangdi to YS on the same day, is it possible?