Without any parents I wonder how they would fare though, they wouldn't have a scoobies what to do as a wild mammoth in the tundra would they or deep in their dna would some natural instinct kick in?
Sorry if that sounds like a daft question I just thought about it when introducing long extinct creatures.
There's already been a lot of research into orphaned elephants. The Sheldrick Wildlife Trust in Kenya has a lot of expertise in raising young pachyderms and preparing them for reintegration into the wild. Of course, nobody has ever studied mammoth behaviour, and therefore there'd have to be guess work as to herd structure and daily rhythms. Elephant society is very complex, and it can't be taken for granted that the complexities of mammoth society would be the same. However, much of their behaviour is innate, and skilled zoologists would be able to interpret behavioural patterns and adapt any program to fit.
We already know what elephant society is like without guiding adults. In Tsavo National Park, after a huge die-off due to famine in the early 70s (followed by an explosion of poaching), many herds were left with teenagers in charge. They ran riot for a while.
(An interesting side note: The disaster in Tsavo was in part due to the head warden, David Sheldrick, not implementing a culling program when it became clear that the elephant population there had outstripped the carrying capacity of the park. When drought struck, thousands of elephants died of starvation. The tusks were there for the taking, which expanded the ivory market. When the drought was over, the middle men still wanted ivory, and so poaching increased to supply the demand. Subsequently, it was David's widow Daphne who pioneered the rehabilitation of orphaned elephants. Successful conservation, at all levels, is very much a process of trial and error. One of the lessons of Tsavo was that, when culling is necessary for the health of the ecosystem, it's best to take out entire herds rather than leave behind traumatised individuals.)