I would suggest that you start with one antenna, an RCA ANT-751R or Antennacraft HBU-22. test reception from a location such as the roof where there is no obstruction or at least minimal obstruction.
Start by pointing toward the SSE, to see if the modestly directional qualities of these antennas allow you to see both groups simultaneously.
If no single aim point provides adequate reliability of the desired signals, you can re-aim the antenna to receive the stronger local signals. You could then add a second, slightly larger version of the same type antenna and use one of several methods to integrate the two antennas into a useable system.
http://forum.tvfool.com/showthread.php?t=2882