I know that House Elves can Apparate inside Hogwarts, but this comment made me question whether they could Side-Along Apparate a human to/from Hogwarts. From what canon tells us, it is impossible for humans to Apparate within the grounds of Hogwarts, which seems to indicate that this should be a simple question, but the events that took place in the Malfoy's cellar in The Deathly Hallows made me curious.
Ron was now trying to Disapparate without a wand.
“There’s no way out, Ron,” said Luna, watching his fruitless efforts. “The cellar is completely escape-proof. I tried, at first. Mr. Ollivander has been here for a long time, he’s tried everything.”
According to this answer from Slytherincess, somewhat of our resident expert on Harry Potter, a wand does not seem to be required to Apparate. The fact that Ron was unable to Disapparate, as well as Luna's assurance to him that "the cellar is completely escape-proof" seems to indicate that some sort of enchantment was put over the cellar to prevent people from Disapparating out of there.
Further evidence for the enchantment happens when Dobby arrives, and Harry asks;
“You can Disapparate out of this cellar?” he asked Dobby, who nodded, his ears flapping. “And you can take humans with you?”
The fact that an enchantment seems to be present, and that despite this Dobby is still able to Side-Along Apparate them out, to me indicates at least some evidence that it should be possible within the grounds of Hogwarts (assuming that the same enchantment was used). So my question is, is there canonical evidence (other than listed above) that either backs up this theory, or that refutes it?