This is my first try at a low poly-scene.
I have just started using blender, so be easy on me 
I am thinking about adding benches made of logs and maybe people.
I really like the “silent” feeling I get from pictures with no animals or humans
Please, do give me tips to what you guys think would fit in!
Maybe a change of camera-angle, heaps of snow, etc.
Possibly start by adding a displacement modifier to the ground? Subtle ground elevation could add a lot.
Is there any other light in the scene, or is it just the campfire? Starlight? Moonlight?
Otherwise, I like the simplicity.
I’m sorry for not answering, but I took your advice!
I found out I did not like the fact of grass standing around in the winter cold (lol) so I removed the grass,
added a new plane, added a displacement mod. and a decimater mod. to it to make it look like heavy snow,
then some rocks with snow on
I’m not good with render settings (Bounces, samples, I get the tile-thing, Seed and so on) so this took
9-10 hours to render on a MSI GeForce GTX 980 GAMING 4G… with 1000 samples at 1920x1200!
(I know it rendered on the GPU)
To answer your question:
There is 6 light sources, 4 around the flames (as I did not want them to be the emitters,
so you could see the “fold” on the flames), 1 emission-plane under the flame and a “moon” (sun)
with a dark grey-blue light to get some realism in with the simple graphics 
(on the first one there was a
point light instead of the emission-plane)
Nice start, man. I’m a pretty big fan of this “low poly” style.
For this particular scene, having a night sky and maybe some northern lights would improve it a lot.
Maybe changing the scene from Landscape to Portrait and adding some mountains to the background.
Here’s an example of what I’m saying http://thumbs.dreamstime.com/z/camp-fire-watching-northern-lights-28970035.jpg
The blues / greens from the sky and northern lights and the yellow / oranges from the fire would make a nice and contrasty atmosphere.
Just my 2cents though.
Thanks for the feedback!
I like the northern light idea, but I’d rather expand the image instead of making it portrait (could always crop it later).
Mountains will be added, but for a different view in the same scene!
I’m making this to be used as a background for myself,
but I might go all out with it and make it a panoramic scene for multidisplays 
