Congrats on your purchase!
A butt should not have any skin on it. If it's wearing a hide you probably have a pork shoulder. Personally, I would remove it but that's just me. Some do, some don't.
On this first smoke, keep it simple.
Learn your smoker & how it acts & reacts.
Make sure to read the 101s
Might to a search (Find) on shoulder.
Good luck & let us know how it goes.