I mounted the WiFi antenna on van today.
The tip of the antenna is 9' 4" from the ground. I ended up mounting it separately from the TV antenna.
The router configured as a repeater is on a bookshelf / gadget shelf I made for the rear of the van.
DW reads real books so the shelf will let her bring lots of books. E-books for me though
Tonight, (van parked in garage) the repeater / antenna combo is able to see and connect to that previously mentioned WiFi network that is 900 feet away during a quick test.
I think it will work well in campgrounds.