Recently we installed several cameras for a similar purpose. We used an Axis P3343-VE which is a rugged outdoor rated camera which runs off a Cat5E + PoE link. While our deployment is wired at the moment, since it is just a outdoor webcam at that point it should be trivial to simply use an AP to bridge it.
The gotcha for us as usual was the power requirement, meaning we had to run some cable even if we wanted to go wireless. Also, we would have needed an outdoor rated AP and antenna to go along with it. A switch closet was closeby so we just went with that this time but deployments with wireless backhaul are still under consideration and seem easy enough.