Recessing your (pickup/eye/receiver) a few inches from the front of the dash should help with the sun issue. If you use a model that looks like one of those "peepholes" for a residential door you could also mount it in a black plastic film container and orient the container towards the position your hand will be in when you drive. No one will see the container back up under your dash and it will keep even reflected sun off the "eye". Good luck with your fabrication - measure thrice, cut twice. (The mirror idea was a little hokey, but after all, it's a Jeep, and the implementation would be cheap.)