Pack a sweatshirt, ‘cause there’s equal chances it’ll be warmer or colder than it looks. October sun is wily like that. If your spouse asks about bringing a coat, say yes.
Pay the people. Farming is hard for the farming family, especially when they spend a whole big chunk of land on parking and bouncy houses. Divide the total cost by the number of people you brought and the hours you manage to spend there. Cheaper than a movie.
Take a big breath of the cool fall air. Consider the seasons and the passage time, if that’s the sort of thing you like. If not, buy a cup of cider. It's fall in Wisconsin, either way.