Marc--MO has had a point limit in the northern 3/4 of the state, a deer must have at least 4 points on one side to be legal during the gun or archery season. You may want to carry some glass so you can count points from a distance. They are trying to increase the number of larger racks and to incourage hunters to shoot does.
Northeast MO has something like 30+ deer per square mile, southeast MO has something like 25 or so. Northern MO has more upland field crops so the deer are larger then in the ozarks generally. There was a case of CWD in northeast MO a year or two ago.
MO has some great deer hunting and the folks are generally friendly. Good luck.