Very ambitious! Yes, get all that research & whatnot done well in advance.
What's your film going to be about?
The world has basically fallen into a nuclear war and there's hardly any humans left. So there's a young character who has survived by hiding underground.
You might like this short film The Island, by forum member Gonzo_Entertainment
Has some similar themes, and will probably give you some ideas on post-apocalyptic bunker living.
You've got some awesome scenery in Scotland