Gary near Tebbetts from Tebbetts, MO on 1/28/2010 9:13:43 PM:
I take my granddaughter (2-3 year old) for short rides in a kid trailer– nothing like what you are talking about though. The longest I have done is about 20 miles from my house to Hartsburg. We would stop at the Jefferson City trail head, Carnahan rest area, Claysville, and maybe one more stop before reaching Hartsburg depending on how she was doing. We always carry some toys, extra water, and pull-ups in the trailer for her. I consider all the trail heads and trail benches as kid friendly, any place where they can get out and stretch their legs a little. As for the traffic, the heaviest traveled areas would probably be around St. Charles, Rocheport, Dutzow, Hermann, and Jefferson City especially on nice sunny weekends. If you do need to stop along the way between trailheads it is best to pull the trailer over as far as possible so you are not blocking the trail for other riders. There are spots along the river where you would want to watch the three year old and keep him/her away from the edge of the steep river bank. Some of the gates at road crossings can be narrow and you may want to walk your bike through them if you are not comfortable peddling in tight places.
If you have never been on the trail, there are several posts on YouTube (just search for Missouri Katy Trail) that will give you an idea of what to expect.
Hope you have a good trip.