Do I need an anti-sway setup too?

As you say you are new to this stuff and you're asking about sway, and you mention driving a half ton truck, pulling a long, heavy trailer, I'll address stuff that hasn't been mentioned yet. Make sure your truck tires are aired to the MAX pressure listed on their side wall (probably 44 or 50 PSI). Do not stick with the recommended tire pressure mentioned in the door jam. I think the same is advisable for the trailer tires too. As has been touched on, make sure you have around 12% or more of total weight on the tongue, and be aware of how that weight takes away from your truck's payload. The hitch you bought has anti-sway built into it and is well respected by some members of this forum. The rest of us probably don't know anything about it personally. Good luck!