I would get into the thick stuff. IT sounds like it is going to bea pain getting in and out of there quietly, so i am not sure. I would definatly find were they are traveling into and out of the thick stuff and sit there if you can do that without making any noise. With only 20 acres of thenasty stuff i'll bet you could rattle them out of there on a weekday when the pumkin patrol is at work. Find where they are entering and exiting, get the wind in your favor and rattle them out of there. I would definatly spend some time clearing a few paths and shooting lanes in there next spring. That way you can hunt it this time next year.