I mean, why the hell not?
He practically does everything else, and Lady Laurent doesn't seem to have a horse or anything, so he presumably carries her tents around everywhere, which could manifest as an extended carrying capacity.
It'd be a laugh, watching players piggy-backing on their own personal Stibbons.
Reward for finishing Cadwell's Gold = Stibbons pet that jogs behind you clapping coconut shells together.
Cadwell would most certainly approve of such a spectacle.
This is an amazing idea why haven't they done this yet?