Once the hallucinatory period passed for my stepson, he was himself again. He recognized his brothers and sister and father when they came in his room. He was no longer restrained. During his hallucinations, he seemed to recognize his family but perhaps thought they were spies or aliens--not sure.
I don't remember exactly how long the worst of the DTs lasted, but it was probably 72 hours, I would guess.
I think if you want to visit you should. But perhaps prepare yourself for the visit to not be what you hope for...