I have played a few "Tough Kassandra" worlds and more or less the same happen here too. I didn't get a single trader on two of my worlds. I got three traders on one of them. And the first one didn't go to well so no info on that one. Raiders do scale up but slowly, Largest raid so far is 14. Raids is almost the only thing that happens. A mad animal for every 5-6 raid. and that's it. Unless you count rain and eclipses as random events.
Ohh I played 1 Randy Random. With all the wanderers I managed to have around 8 people in my base before the first raid showed up. Only two of my settlers had a gun and the other nothing. but My base had good defenses with turrets so I wasn't worried. When the 6 raiders started moving at my base that event that shut down all electricity happened and left my 2 gunmen to face 6 well armed raiders. It didn't go well. I don't remember how many merchants (if any) I had. I am sure that no weapon traders showed up.
Ohh I played 1 Randy Random. With all the wanderers I managed to have around 8 people in my base before the first raid showed up. Only two of my settlers had a gun and the other nothing. but My base had good defenses with turrets so I wasn't worried. When the 6 raiders started moving at my base that event that shut down all electricity happened and left my 2 gunmen to face 6 well armed raiders. It didn't go well. I don't remember how many merchants (if any) I had. I am sure that no weapon traders showed up.