Where can I find Trevor & Zoe for their yearbook photos?

OK i think you can find Zoe in blue skies but once u have completed the game and are on chapter 6 (Endless Summer) u will see her roaming the school. Trevor........????....... ummm i think he should be.... wait is he a little kid, bully, greaser or a prep????????? if u tell me that i will tell u. I"ll tell u or respond when i ploay it and find him in the year book. or see him roaming

Trevor Is a Non-Clique student, meaning you can find him almost anywhere.

Zoe is a Townie that can be taken during the mission Busting In Part II or in the campus after completing Complete Mayhem. Trevor is a non-clique student that can be found almost anywhere on the school campus. Zoe first wears a white singlet with skull and blue shorts while after that, she wears the school shirt and orange skirt. Trevor has black hair but different hairstyle than Constantinos. Trevor wears a dark green vest like all other non-clique student do.