New blender short film and a question

hey guys i found this blender movie on youtube heres the URL i think its kinda cheesy and gay lol but heres the link now my question if i where to have a very large landscape scene in one shot where the camera moves around this large landscape would i make it large or make it small and make it look big with the camera or make the meshes big and then when i do the animation i shrink it down?

Either way will work.