I said:
1) There doesn't seem to be any plausible argument for the existence of a 'special relationship' between the DSR and park visitors.
2) Whilst the DSR had the power to refill the hole, it didn't really have the level of control that seemed to be required by the cases, nor did it have a duty to refill the hole (one which could have been enforced by a visitor).
3) Hmm, it seems I forgot to look at the vulnerability of visitors in relation to the DSR. But, had I done it
I would have probably argued it could be satisfied.