init

[myGroup, ["marker_1","marker_2"]] execVM "teleport.sqf";

teleport.sqf

params ['_grp', '_dests'];
_mapPos = getMarkerPos (selectRandom _dests);
{
  _unit = _x;
  _uPos = _mapPos;
  if(_alt > 0) then {
    _uPos = _mapPos vectorAdd [random 100 - random 100,random 100 - random 100,_alt + random 15 - random 15];
  } else {
    _uPos = _mapPos vectorAdd [random 20 - random 20,random 20 - random 20,0];
  };

  _unit setpos _uPos;
} forEach (units _grp);