What to wear to a wedding?

So I have a wedding to go to on Halloween, even weirder and more last minute? It’s at a brewery.

I don’t know if I should wear a dress since usually people would wear jeans and a tshirt to a brewery but I don’t want to wear jeans and be rude.

It’s kinda chilly here but not too bad, but I don’t want to be walking around in heels with my hands full of beer, or a summer dress.

Very confused, please help a girl out 💕