Hopefully I can help you with some routing in KY.
Check out my blog/site (below) for remote routes. I have a few routes that can be linked together to get you just West of Lexington where you should be able to work your way into town.
You can cross the Ohio River at Cincinnati or better yet catch the ferry to Augusta Kentucky
(link below to video) where George Clooney grew up, quaint old river town.
I'm working on a route between West Lebanon OH and the ferry terminal across from Agusta KY. This would link the Little Miami Trail remotely to the ferry terminal and bypass the greater Cincinnati area. Let me know if this would help!
You'll find my routes on paved remote roads with little traffic. The downer for some is that they are most always more mileage however the scenery is always worth it, IMO!!
Feel free to email me if you need more info.
Hopefully this helps!
Little Miami Bike trail: http://littlemiamibiketrail.com/
Ferry to Agusta, KY:http://www.youtube.com/watch?v=QIOBgCSp74c&feature=youtube_gdata_player