Yup!
Black tie. Just kidding! It's a backyard wedding, so whatever you will be comfortable wearing in the August heat. The reception and ceremony are going to be held on grass, so plan your shoes accordingly.
The only hotel with shuttle service is the Holiday Inn Express, Woodbury. The hotel has a free shuttle to Stillwater between 2PM - midnight. Each guest can use 2 round trips, I believe. Please make sure to indicate when/if you would like to use the shuttle when you make your reservation to ensure it is available for you.
There will be parking available on site.