First off, I don't think that you're dealing with separation anxiety, I think you have a dog that is not fully house trained, and I do think crating will help. I think anywhere you want to set up a crate is fine, it all depends on your personal preference. Some people crate in the room where they spend the most time, others like someplace away from all the activity. Just pick a spot and see how you like it. Do a search for crate training and housebreaking and you'll find alot of good info...I personally don't like to punish for a mess that I didn't catch the dog making.
True separation anxiety is severe and usually involves extreme destruction, barking, panic, and even the dog injuring itself in an attempt to get out of the crate/room/house and get to you.
True separation anxiety is severe and usually involves extreme destruction, barking, panic, and even the dog injuring itself in an attempt to get out of the crate/room/house and get to you.