It sounds like you have an exciting trip coming up! For film in the evening time, 400 speed film would be best. There are higher speeds--such as 800 and 1600. For black and white there is a 3200 one as well. Make sure to have plenty of fresh batteries for your camera and external flash. It will be worth it in the long run! Also, if you do decide on 800 speed film, please tell the x-ray screeners to search your film bag by hand.

Regards, Nelly MS