What should I wear to America?

I’m going to the USA late next year, to visit my friend. What should I pack? We’ll be up in a rural area of the USA, in a small southern town. It’s an area where I’m better off not dressing to look like I’m well off. Leaving all my nice things home. If I were to arrive in fall, say, October or November, what would I wear?

What should I wear to America?
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