i've hunted KS for years, and since I have a Lifetime license I can get a big game tag just like a resident every year (KS is one of the few that allows(ed) that, not sure if it is still offered). Anyway, if you have some specific areas to ask about, shoot away. Generally the WIHA areas are pretty darn good. The problem with rifle season is that Pheasant season opens a couple weeks before and the deer are pushed all over the place. Where you are thinking of going is BIG TIME pheasant country. That can help you or hurt you, just depends. If I could pick one weekend of the year to bowhunt (treestand anyway, spot and stalk would be earlier) western KS, it would be the upland bird opener. The "Orange Army" has deer running everywhere, the rut is on and you see deer ALL DAY LONG. Two weeks later, after the rifle opener, it is a different story usually. If you have pre scouted a bunch of areas, don't expect the deer to be doing the same thing, or even still be there.
If you can bow hunt, go the upland bird opener (and the week before), or go Muzzy hunting early September, that is another great option. Rifle can still be good, but tough, most of the bigger bucks will be in the middle of a HUGE CRP field, with 6' tall native grass, bedded down till after dark. Thick and darn tough to get up on them or even see them. Look for small out of the way parcels of WIHA that others will over look or think are to small to hold enough birds to mess with on a drive with 10 guys.
Chad