Kohler is a possibility though I haven't been there in many years and it could be very run down. Plus I don't know how kid friendly it is. A lot of the town revolves around the Kohler business (faucets, fixtures, interior decorating, etc.) Read: adult. The golf courses are great. How old are your kids?
This is a pretty tall order if you want to drive and you want luxury in a natural setting. Would you drive 9 hours? Blackberry Farm in TN is fabulous.