For my trailer I need to use several different filming locations to represent several different locations in the film, ranging from a forest, to a local landmark and even a police station.

The second location I need is for a police station type location, so I am going to use my school to act as a sort of 'holding cell' for the criminally insane. This is because the building is large and very brightly coloured, but also available to shoot within my schedule.
Other then these key places, I may use a few simple/stock footage shots of sunsets or local buildings/streets just to help build suspense/tension or to fill the trailers gaps. The sunset footage could also be used to help represent the time of day.