We are a good 50 miles away here in Northern Neck VA and I get all of the networks channels either from Washington DC or Richmond VA which are both some 50 miles away.
My antenna is the crank-up WINEGARD BATWING with the UHF dipoles on it... For some reason the CBS network channel is the worse one for me to get constantly and naturally that is the one I want to watch all the time...
Here on the house I use the 8-bay BOW-TIE flat array and Washington DC comes in like a charm on all some 80 channels I get from them. A whole bunch of these channels of course is the PBS channels.
This dual flat bow-tie array cost around $70 from Solid Signal on line...
Looks like this one...

Here at the house I use a RCA pre-amp mounted on the array which runs from a DC CONTROL VOLTAGE coming up the coax. This also will work from the 12VDC antenna pre-amp Voltage in the RV's just like the BATWING uses...
When we camp OFF-ROAD in our POPUP trailer we have a 10-foot pole up the side of the popup with the BATWING antenna mounted on it. Works great all over the East and South camping areas here on the East side of the US.

Roy Ken