I too agree the dome antennas are not that great for TV reception
Wi-Fi.. This can act as a "Wi-Fi Extender" basically the same as what I used.. Listening to the park's wi-fi and "extending" it into your RV.
I had either a linksys WGA54G or a Umbquiti Loco M wi-fi "Adapter" I put atop a flag pole then hooked the cat-5 side to a Router inside the RV This is basically the same concept.
It can also act like a Cellular Hot Spot. and being up on the roof. generally has better reception that one inside the RV Generally.
I know one person who put his "My-Fi" box atop a flag pole for added range.. Worked too.