I'm rubbish at that sort of thing
Here is what I do: I go
here, find a map that is reasonably close to what I want, and then draw a grid on it. Then I put down single letters for peoples' names. Like
this. It's pretty quick and easy, but works well enough.
Sometimes I copy and paste pieces of the map over other parts, to change it up a bit, if I can't find one exactly like what I want.