These fishing holes are usually too small for you to build a dock, so if you want to catch the fish, you'll need to send a villager. The frozen lake takes up a large portion of the map and you aren't able to build on top of the lake. So you're left with the outskirts of the map. Since you can't build on top of the lake, sending your forces through the lake may take too long. This map features a bunch of cliffs making the map look like a huge maze.
Forests are small and scattered throughout.
However, there are many routes by which your opponent can reach your village and you may overlook some spots when putting up walls. Best advice, scout out the map and find the easiest route that leads to your opponent. Make sure you build on top of the cliff and not on the bottom. Or build away from the cliff. This is a very interesting map.