I'm also about 40 min east of kc.
time wise it will be awhile before rut kicks in. or anywhere close to it.

id hang a stand somewhere ner the edge of the bean field. signs of where they are entering or exiting the field. ie: look around for small paths that seem to head into nowherespots where the tops of the beans are missing. most likely they are hitting the edge of this field right before nightfall.

Or if you have a ground blind set it up near these areas as well.