This is some kind of follow-up to [this question](http://worldbuilding.stackexchange.com/questions/30143/where-to-find-shelter-in-a-cold-dark-world-at-war). *TL;DR for the question* : There are multiple small (10-15 members) nomads that must travel from place not to be found by monsters that hunt them. 

This is a fantastic world in a medieval era. The nomads have some experience with hunting and fighting. This means they have knowledge of war strategy and trap making.

There are two kind of enemies that can attack the camp :

 1. Most of the time, it should be groups of skeletons, which can be handled by the nomads. But after they've taken care of the skeletons, they must change location because they're now discovered.

 2. Rarely, nomads can be attacked by much stronger creatures. They never attack in group but are devastating (Let's say werewolf kind of creature, without any known weaknesses like silver). They are fast and particularly strong but do not have abilities to jump great distance or to fly. In this case, they must flee right away, leaving everything they have behind.

They live in a world that is mostly always covered in snow and is pretty dark. Some plants (Including trees) still live and there are lots of dead trees, meaning they have access to wood and other plants to work with. They could also travel with any kind of tool that is small enough not to be a burden to carry.

To increase their survivability chances, they must set up defences. Though, since they're nomads, they can't build walls around their camp or do any "long term" work on their camp. The defences should be able to turn the fight against skeletons to their advantage *and* hold the "werewolf" a little so most of them have time to flee (But it is assumed that they will loose some members when such a creature attack).

I believe such defences would include some sort of "alarm" that would warn them that something is near their camp.

So, what kind of defence, traps and alarms could be set to help them in their war for survival?

They're mostly hidden in non-dense conifer forests and grottos. Considering the territory is very large, they can stay at the same spot for about a month, unless they have reasons to believe they were discovered.

Edit : The skeletons are commanded by an hive mind (Explained in [this post](http://worldbuilding.stackexchange.com/questions/30304/making-skeletons-a-challenging-fight)) but they do not communicate with "werewolves" at all. They work on the same side but never together unless it happens that both of them fall on a camp at the same time by "luck". The werewolves-like creature are human-like intelligent and sadistic. They like to play with their preys (if that can be any help) and won't hesitate to take a longer time to kill a target just for the fun of seeing them suffer (which might give more time for the others to run).