OK - thanks for your patience. I'm clearly a neophyte here.
I went on my roof to scout out broadcast azimuths. My first estimate of channels to try for is likely wrong.
Here are two views of broadcasts of ABC, NBC, CBS channels. In each photo the degree azimuth is about the center of the photo and is the magnetic bearing.
View towards 244 degrees (channels 7, 12, 29, etc.) - appears to be completely blocked by large trees. I am assuming this won't work.
View towards 24 degrees (channels 10, 25, 35) -- The hill involved is visible in the center.
So, it appears to me that I may have more success with the 24 degree azimuth.
Any opinion about the trees causing problems for the 244 and 24 degree azimuths? Unless success seems highly unlikely, I'll go ahead with the Winegard HD7698P and try to catch some channels.