The Reolink Duo 3 has a fairly large hole where the network cable comes out. I was worried about bees or other bugs getting inside. This plug seals up the majority of the hole and lets the network cable through snapping in place.

I would suggest 3 perimeter walls. It isn't very big and is basically just solid plastic. I printed in PLA and figured it would be mostly shaded in my eves. PTEG or ABS would be ideal because they are more UV resistant.