I think Opal was insane.
Opal has to be the most curious character in the entire film. She claims to be a BBC reporter even though - unless I missed my cue - we never see a film crew. She talks a lot of nonsense and uses the excuse that she is making a documentary about Nashville in order to get close to famous people even though she never shows anyone any sort of credentials.
She has two scenes late in the film that make us question her sanity: One takes place in an automobile junkyard where she talks to herself, lamenting about the rusting metals hulks being tossed away and forgotten like some sort of automotive holocaust (she compares the rust on the cars to dried blood). The other scene takes place in a school bus storage lot where she tries to decide how this lot could properly be described as the stuff of children’s nightmares.
I don't know, the movie never points this out, but I think she's clearly nuts. She wanders through the film explaining that she's making this film but she's never really interested in anything and she's easily distracted.
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