Something else I just noticed: there is no such thing as wooden gates. I'm playing with Research Causes Evolution, so I'm going rather slow: Fast inserters and the steel axe are the most advanced technologies I've researched yet, at almost 15 hours in the game. :-) So far, dart turrets are doing a great job at keeping biters at bay, now that I have a steady early wood production going. I'm currently trying to fence in my mining areas (still with burner drills) and power station/wood production, and I find that I'm lacking gates.
The default gates look out of place between wooden fences. Also, default gates require green circuits as ingredients, which seems logical because you can control the gates via circuit network and even if you don't, there must be some kind of sensor to determine when to open or close a gate. Somehow, I have the feeling that electronic sensors would not fit in with the rather primitive wooden fences. But leaving a gap in the perimeter also seems like a bad idea.
Honestly, I have no idea how to implement wooden gates without breaking immersion. So, how do you use the wooden fences? Do you just leave gaps heavily protected by dart turrets, or do you remove/rebuild palisades if you want to go out?