Consider Garos as having explained this to you at some point on your travels.
He would be quite silent. In terms of noise, in a forest he would be difficult to tell apart from a normal animal. He is practiced at staying out of sight from surface dwellers.
Garos straightens up and gives a little Roman salute, before going prone and slinking off. A few minutes later smoke can be seen in a copse of trees a little away from the Norse huts.
Some of the Norse men take a look and for some reason a furious discussion erupts between them. This summons those within the huts to come outside, of which there only seems to be two bringing the total to eight.
After a bit of shouting and with constant gesturing out at the sea, five of them leave to go look at the fire in the woods. The remaining three seem pretty angry for some reason, bellowing about something and nodding in agreement with each other.
OOC: Their weaponry is a simple shortsword and shield. Their armour is animal skins. Dougal can tell it is reindeer skin specifically.
"We can sing "You'll get F'All from Rockall" as we retreat later on", Brian suggests, and starts approaching the Norsemen - going from cover to cover whenever practical, or charging up whenever it was not.