This is correct. The idea is to be a sort of human weathervane, with outstretched arms indicating the direction the wind is blowing. Stand at the upwind edge of the helispot.

Sometimes as the helicopter lands the rotar downwash can kick up dust or snow to the point of obscuring the landing spot. In this case it is important that the person marking the spot (the human weathervane) does not move, since the pilot may be using him/her as a visual reference point.

If you use something for an improvised wind sock (as suggested above), be very careful that it is well secured. If it gets loose and gets blown up into the rotars it can damage them. A good alternative to improvise a wind sock is a piece of surveyors flagging tape securely tied to a bush or tree near the helispot.