Paddle the Missouri River - KC to St. Louis

I am planning a trip from Kaw Point, KS down the Missouri River to Columbia Bottom Trail (at the Columbia Bottom Conservation Area) near St. Louis.
All of the details are loosely being prepared, but I thought I would get it set on the calendar so there is a hard date associated with the trip. Naturally, it can be weather pending as well as other life factors.
I suspect the trip will take approximately 11 days, but wanted to provide myself with a buffer in case there is inclement weather. There will be at least a day or so for logistics to park and shuttle as well as recovery and that kind of thing.