Boat travel from Guilin to Yangshuo next Sunday (20 November).

I plan to make a trip on boat next Sunday (20 November). Do you know where is the place in Guilin where I can take the boat (wharf)? I will start probably from the Qixing area of Guilin. There are more boats from Guilin to Yangshuo in the same day? At what hours? What is the price for this. It is possible to return in Guilin in the same day by bus?