You would do yourself a disservice by going with what one of us have, without speaking to a distributor first. You can buy a kit, but there are many different cameras, depending on your needs/wants. I think the view angle is very important. To my knowledge none do it all. The technology changes often. I am totally satisfied with my camera, but do not think I would be had I followed my research instead of the camera tech/salesman. They sell many cameras, so they will have what you want, just need to know what it is. These guys are easy to talk to, and many RV.NET members in all forums have purchased from them for years. I have never heard a bad word.
RV CamsI think this is what I have
7" Color System with Audio and IR Night Vision Code: 70-CHNV. I have more than 30 feet of night vision. My camera is Color. I also bought the 25-foot Extension Cable for $10. It allows me to disconnect the cable between the truck and TC. A second 25-foot Extension Cable would make it very easy to move the monitor inside the TC, so you can use the camera as a security camera.
Just for giggles, I was messing with a Harbor Freight camera, and it works fine with my setup. The picture is not as good a quality, but acceptable for day time.