Dear Sir or Madam,
I am writing to you because I would like to ask you about the trip to the national park. Is this offer current? If it is, when will be the nearest date of trip? And how are we going to get to the place? Where we have our assembly point? I am very keen on birds and I want to ask if there will be a chance to take photos? Do I have to have any special clothes and buy extra insurance? Please, write to me soon.
Yours faithfully, XYZ