This one is definitely the closest! Kelsie's family grew up camping and hiking here. It's such a beautiful area and hopefully will be full of fall colors. There's plenty of history to explore between the Pioneer Village and Grist Mill and the Gus Grissom Memorial.
Holiday World was such a big part of my Kelsie's childhood. Their hours aren't ideal in October (see website) but if you'll be coming early or sticking around, we would strongly recommend going! It's about an hour and a half from the venue/inn.