Got the OEM trailer cam from Ford with my truck. Shows up on the maim screen but it is only for back up. So I bought a cheap rear viewing cam from Amazon to use on the road. I thought Furion was too expensive. I use it mainly for passing so I know when I can pull back into my lane. It works great for that. As far as backing, I don't really use either cam for that as the depth perception is so bad on both of them. The wide angel is the killer.
I didn't get the factory gps with the truck as dealer said it was only a plain one the not RV or trucker, so I have a Magellan for that. My problem now if fitting all these screens on and around my dash, along with my phone.