Bryan I currently have 6 cameras installed in the woods with about 10 different IR sources on trees as well as 2 4port switches. The furthest run for me is about 100m but the loads are constantly changing as I add more cameras / lights. I run 48 volts out to the trees. There I use a 12 volt buck voltage reducers like this one:
Amazon.com: Down Voltage Regulator, DROK Car Power Supply Step-Down Module DC 20-55V to DC 12V 10A 120W Waterproof Buck Converter Volt Transformer Reducer Board: Home Audio & Theater
it's all of $18.00 and will provide 12 volts out up to 10amps with any input voltage from 20-72V input
To get the 48 volts I use something like this:
It's all of $21 and will supply up to 10 amps (480w)
What will that get you? Well, if you are drawing 2 amps on that 12 volt side there will be about 1/2amp draw on the 48volt side.
If you use 18ga wire (assuming 1000' run or a total of 2000' of wire) the resistance ~13ohms. You will get a voltage drop in the wire of 13ohms*1/2amp=6.5 volts. So the buck device will get 48-6.5= 41.5 volts. Twice what it needs to operate fine. You could triple your 12volt load and still be fine. Plus you would probably save over $100 in wire cost.
The big advantage for me is having that 48volts out there. It gives me flexibility to extend my camera coverage. I already have 2 switches powered by 12volts mounted in the trees - and can add more. No need to pull any more
cat5 wire.