Printed everything at:
PLA
20% infill
.2 Layer Height
.8mm shell
No supports

Parts used in my set:

Catan Resource Storage Box
http://www.thingiverse.com/thing:45591
I had to scale this part up 112% to get it to fit recently purchased catan cards
Also scaled down to 75%

F5 twister robber catan
http://www.thingiverse.com/thing:456765
I had to scale this part down, but I can’t remember how much

Settlers of Catan Round Player Pieces
http://www.thingiverse.com/thing:46065

3D Catan Terrain Pieces
http://www.thingiverse.com/thing:26979

3D Catan Port Water Tile
http://www.thingiverse.com/thing:360187

3D Catan additional Terrain Pieces
http://www.thingiverse.com/thing:261449

Catan Terrain - magnet socket
http://www.thingiverse.com/thing:565756

Catan Port Tiles
http://www.thingiverse.com/thing:53812
I scaled these down .97% so they fit loosely in the port tiles

Settlers of Catan number tiles
http://www.thingiverse.com/thing:112018

Changes I would make:

Faster printing round catan pieces
http://www.thingiverse.com/thing:145033
I found that these save a lot of time, and they don’t look any worse in the finished set

Settlers of Catan Road Token
http://www.thingiverse.com/thing:622338
The road pieced I used are hard to pick up.