The Alamosaurus carries this whole attraction. It is anatomically accurate and I couldn’t see any shrinkwrapping either. They even got the feet right, though some of the claws were bent at odd angles (it looks like they’d been kicked or messed with though.) The neck only moves back and forth slightly, but it is still an imposing figure and one of the best sauropod animatronics I’ve seen.
Also, this is only a medium-size Alamosaurus. Apparently they could get much bigger.