If all else fails you may try to spot him when hes bedded, then look for a high spot or vantage point within a hundred yards downwind or crosswind from him. You say you have no visibilty in there, well then neither does he. If you can find a spot that you can get within range of him and maybe still see him, go for it. Just remember to find a landmark very close to him so that you know where he is. Maybe even have a partner watch him as you stalk, and QUIETLY communicate with one another about what hes doing, just in case he gets up and moves while your stalking. Good luck and get after him, You cant get him if your in here. LOL