In the heavy winds we've had lately they will more than likely be roosting low, they also like to roost around or over water , and in places with good cover like larches and evergreens, best time to go I about 1 at this time of year, that gives you about 3 and a half hours of shooting, they won't all come in at once, or all to the same place, it will be in drips and drabs, walk through the wood at night and see where they get up from