Informal letter

Dear Kim and Annie,
I am writing to inquire about river-raft trip. I know that you were in this kind of trip last term. It was really kind of you to send me the information.
Firstly, we would want to know how many people were in your group, because our group has about 30 people.
Secondly, we would like the information about the price of coach hire. Is it the best option to us?
We intend stay a weekend, so we would like to know how much a weekend of river-rafting per person cost. Do you have any idea?
The advert that I get about this kind of trip, don’t inform if we need worry about safety precautions. You think that we need take any safety precautions?
Thanks again for helping me out. I really appreciate it.
Hope to hear from you soon,
Love,
Ana