Old Geezer Scout from Jefferson City, Mo. on 3/3/2011 8:48:57 PM:
I believe it would be a safe and fun adventure, with appropriate parental supervision. Exercise the usual cautions in towns, at road crossings and along the river, and you should have no problems. I guess the first caution is to understand that it will be quite the undertaking to do the entire trail. Boy Scout motto "BE PREPARED", especially if "roughing it".
As for personal safety or security on the trail and camping at camp grounds, I have never seen any indication that it is not safe. That is my personal experience, others may think differently but I have not heard of any problems at all. I have spent quite a bit of time on the Katy Trail, but of course it is a matter for your comfort level, a concern is certainly understandable.
You have come to the right place to get the information you need to make it a good trip, hopefully others will have some input. Good luck.