I've read through some of the questions and review regarding Guilin and I have some questions as stated below

I'm planning a trip to Guilin. I've read through some of the questions and review regarding Guilin. I have some questions as stated below:

1. Can I make a request at the travel agency at Guilin to make arrangement for my Li River Cruise tour after I'v reach Guilin? Do I need to make reservation earlier? Will it be cheaper if I make reservation now or it'll be almost the same?

2. Are we allowed to drop by any attraction spots along the River like Daxu Ancient Town? If yes, is there any admission fee? Is the admission fees included in the package?

3. Is it possible for me to spend a night in Yangshuo after the Cruise? If yes, do I need to book the hotel myself now or let the agent make the arrangement for me when I reach Guilin?