The stations that are heard the best in NW Indiana (around Gary) are 750 WSB (when WNDZ Portage signs off), 700 WLW (overall the best in my area), 1530 WCKY, 650 WSM, 820 WABP, 840 WHAS, 850 KOA (one of the weakest stations, but still heard every night), & 1120 WMOX are some of the stations I hear every night.
KSL is almost never heard in Gary anymore, due to WYLL building out their 50kw 6 tower array in Lockport, IL for night service.
WOAI gets some splatter from WRTO , but little, except for when ground is extremely wet, and can sometimes make WRTO's signal overpower WOAI's signal in Gary. Once WRTO officially transmits from the new tower site, WOAI will almost never be heard in Gary, due to the night signal will push further into Gary. They still have to protect WOWO Fort Wayne on 1190, which is why the signal can't go too far into Indiana.