[kaptain]

I've decided to use a reolink IP POE camera system so I can use it two ways, one for observation of traffic and the other security of the coach. They have a camera which incorporates 2 cameras in one to give you a full 180 degrees for the rear then one on each mirror pointing to the rear and one pointing forward for dash cam use. The front and mirror cameras will be pretty simple to install but the rear might be a bit more work.

Is this one you are getting? https://www.amazon.com/B0B2P9RL53/
It doesn't look like it's designed for vehicle applications.
The only good part is the dual lens and 180 wide angles. But many vehicle-purposed cameras offer wide-angle views, typically 130-170 already. I think that's sufficient.
I think using Reolink dual lens has below potential drawbacks:
1) PEO uses a 48V power source, an industrial standard for telephone equipment, etc.  This means you need to create a new power source for the camera, from your existing 12v or 110v, or use a hub/switch with a POE socket/output.

2) Lacking features such as DVR, logging GPS data, etc. These are often standard features of vehicle-purposed cameras.
3) Dual lens while it's great that it provides a wide-angle view, several review pictures posted on amazon do not show good video quality combining/merging images from 2 separate lenses onto a single screen.
The technology is either too new, or the implementation of it is not yet perfect.
4) Functions such as motion detection (Human/Vehicle/Pet identification) likely require the purchase of separate paid subscriptions.
5) Certain other functions you will probably not use or find difficult to use on an RV (such as 2-way audio). These features are resource overhead for a camera-based processor, it consumes camera resources. Even if you ever use it, you will find people the person you intend to talk to can't hear you due to road, engine noise, and small thus low volume speaker.

But I could be wrong. Please correct me if so, because I never used a camera designed for our door stationary application on a vehicle made by Reolink.
And if you find it works for you, then that's great.