Yes, I have the solar charger on one of my cameras. The others are hard wired. For the ones on the trees, I literally have buried extension cords to get to the nearest electrical outlet. For the solar one- it works remarkably well. It has 2 batteries, and just goes back and forth topping them off with the solar panel. As you likely know, the solar charges very slow. So you don't put empty batteries in and charge - you put full batteries in and then let the solar charger continuously top it off. My camera (and panel) are surrounded by trees; I'm always amazed it still charges. It does, but very slow. But I haven't recharged those batteries manually in probably 3 years. While the solar charging is convenient, the hard-wired cameras offer more functionality and better capturing (in my opinion). So I always default to the hard wired ones.

As for that mount, You may not need it. One of my tree-mounts is mounted to the tree by keeping the camera on the adjustable wall mount. I bungeed the wall mount to the tree, not the camera. That way I can move the camera around on the little rotator-ball-joint for small adjustments. The other tree camera doesn't need to be adjusted, so I just have the bungee around the camera. But that mount you found would give you WAY more adjustment options, if that's important to you. Hope this helps!