The SCCA’s broadcast division includes WRVL(FM) and WWMC(FM)—a student-run station— as well as TV stations WTLU (LP) and full-power station WEFC, formerly WDRL.
I thought Jones Broadcasting got WDRL...
At my house in Blacksburg, a worse location than yours, I can receive WSET with a very old rooftop antenna and an amplifier. The antenna is less than 20 feet up and pointed at the center of a big oak tree. Reception is generally very good, but it is not a stong signal. Sometimes I lose it when it rains or snows. Also, things like LED light bulbs can interfere with reception.
Channel 13 is in the same direction as the Roanoke stations. You could try to get all your channels with an outdoor, all-channel UHF/VHF antenna. Antennas like this with the highest gain tend to be very large.