I reverse engineered the tvfool report to a location close to your location at the end of the road.
It looks like many Close trees to the , east , south east , south , north.
As always , trees and tree leaves do a real fine job of , reflecting , reducing , blocking , Tv reception and so do buildings and other obstructions including your own house.
It is best to install antennas at a location that has the lest amount to no amount of obstructions of any type or kind in the directions of reception including your own house.
For increased reception of the VHF high band channels 7 thru 13 ,
WXIA-DT REAL VHF high band channel 10 , virtual number (11.1) NBC.
WGTV-DT REAL VHF high band channel 8 , virtual number (8.1) PBS.
Aim a Winegard YA1713 VHF high band antenna at about 105 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
---->DO NOT connect the YA1713 and the ANT751 together with a reversed splitter. <----
A reversed splitter will allow the antennas to - cross talk - and make the reception worse.
Connect the YA1713 and the ANT751 together with a special coupler , use a UVSJ = UHF/VHF Separator/Joiner.
Connect the ANT751 to the UHF connection of the UVSJ.
Connect the YA1713 to the VHF connection of the UVSJ.
The remaining third connection of the UVSJ goes to the Tv/s.
Type these letters --> uvsj <-- in the
http://www.solidsignal.com , search box.
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I recommend Do Not use the preamplifier the Strong Tv signals that are getting through the trees and the reflected signals from the trees will be amplified and most likely make reception worse on some channels.
Yes it is Ok to try reception with and without the preamp.
When trying reception without the preamp , disconnect/remove the preamp unit , the power injector , the power supply.
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Here are some strong and Sturdy antenna mounts ,
http://www.ronard.com/Tripods%200703/4712.html ,
http://www.ronard.com/909911.html.
Buy the ronard antenna mounts at solidsignal by typing the word ronard in the solidsignal search box.
Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.winegarddirect.com.