Wow nice! How'd you score such a great deal?
Do a search of dealership inventory within a 200 mile Radius. Find the dealership with the largest inventory of the vehicle that you want on hand. Then narrow the search to the vehicles that has been sitting on the lot the longest, it is usually the most expensive one they have on hand. Be prepared to spend the whole day (I was there for 9 hours), negotiations on car prices isn't fun and is completely exhausting. With all of this, plus letting the dealership know that you know the 2016 Camaro is about to be announced, making the Camaro you are looking at as being already obsolete, then you start working on price. DO NOT at any point mention that you have a trade-in, even if you do, I'm sorry to say, lie. Once you get to your negotiated price, then mention your trade-in.
So, the sticker price of my Camaro was $43,480 and I bought it for 33,166. I misstated and said I got 22% off. I redid the math and it was a little over 23%. I traded in my 2003 Trailblazer and got $4,200 for it plus I got window tint, stripes, and wheel locks for the Camaro. So $28,966 plus TT&L after trade in.