I have been flying into LOU, Bowman Field at Louisville for the last couple years. Have seen several RV's coming and going from there. One of my customers talks about a friend with an RV4 based at LOU.
The FBO at SDF on the other hand is not going to welcome you unless your RV is inside the jet you're flying.
My dad and I are building an 8 currently, but we know of several people in the area who have built or are building RVs. Seems to a community of us growing.
You will also find a number of pilots, WIZZ, GREASE, JOKER in cincy (short trip from Louisville) all FFI cardholders who fly formation with the River Rats. Give me a shout at [email protected] Glad to have you in the area.