I don't know if multiple planes exist in the Divinity universe, but in a DND setting, the camp could be a "pocket" in an other plane, material or otherwise. So you could take it with you, like the astral prism, and "unfold" it when time to camp, so outsiders could still visit it, once set up.
Yes they do, but a dimensional travel ability would kind of break the game especially lore-wise so I don't see it.
And it wouldn't make a difference to be able to unfold it but then not have it be exactly on the same field as the game spot where you used it, not to Larian at least.
