[MBAtarga]

I am looking for suggestions for some sort of remote video system that would allow monitoring of a rifle target board that is 900 yards downrange from the shooting position. There is no AC power at the target location, so the camera portion would have to be battery powered (or perhaps operation from an auto battery with inverter for 120AC). It would likely have to operate via wifi and would be monitored from a laptop or smartphone at the shooting position.

Does anyone have any suggestion as to what I should be looking for? I've looked on line and can't quite narrow down what I should be shopping for.