There really aren't any Slab holding waters in "Northern KY" (North of Lex) ... most lakes between Cinn & Lex are very small waters.
Cave Run & Taylorsville are actually East & West of Lex. (respectively) and about 1.5hrs drive from here. The better waters are all South of Lex. ... Green River Lake, Rough River Lake, Barren River Lake, KY/Barkley, Lake Cumberland, and Dale Hollow. The closest being Cumberland, again a 1.5hr drive (minimum).
Right now ... Taylorsville & Cave Run are both above pool, for this time of year ... and are probably a little murky to muddy. Give them a week to settle down, and if we don't have any more "Frog Choker" rains ... either or both of them should be in pretty good shape. Expect lots of 8-11" fish as the norm, in either lake ... with a better chance of a 12" or longer fish from Cave Run. Fish either one with jigs or minnows around standing/fallen timber, in the 4-10ft depths.
And don't forget to have your Non-Res Fishing License, boat registration papers, and all appropriate safety equipment (for the specific length of your boat) & life jackets !! And be sure and find out whether or not you have to pay to launch/park ... depending on which lake you go to, and/or which ramp you use !! (the fee is usually $3/day on State/COE lakes). Some ramps, like the one at the Settlers Trace Marina on Taylorsville, have a "courtesy box" ... where you fill out a envelope, put your $3 in the envelope and then put the envelope into the "courtesy box" ... and tear the "numbered tag" off the envelope and place it on the dash. (see this link:
http://parks.ky.gov/faqs/index.htm#boatramp )
............ luck2ya ......... cp