What type of terrain are you calling, open feilds, thick brush, creeks ? Secondly, what sounds are you using and do you change them periodiclly during your stand? What time of day are you calling and is it legal to hunt at night in Washington? Finally, in your opinion, when you set up appx. how far do you think you are from a bobcat? A guy once told me something about bass fishing that really sounded simple when he said it, but he said "you cant catch a bass were he aint", lol. We'll you cant kill a cat in" most" cases without being near a cat. Cats arent like coyotes and tend to not want to come very far to a call, they will in some cases, but you want to stack the odds in your favor and not force them to have to cover alot of ground to get to you. The most important factor ultimately over any of this is if you are day hunting or night hunting because they are two completely different games and will determine how you will approach your stands. Answer these questions for me and I will try to help you out with the area you have to work with. Chris