• First, of course, it’s a matter of deciding how to attempt to perform such a de-extinction operation, at a purely technological level.
• Second, there’s the question of the ethical implications of such an act. In other words: Would we have a right, morally and socially, to perform such-and-such a de-extinction operation?
The de-extinction of dinosaurs would appear to be a failure at both levels. So, you should feel free to go ahead with plans for a nice wedding, say, with no fear of unexpected interruptions.
The de-extinction of a woolly mammoth would appear to be a far more reasonable project.
On the one hand, with the help of modern elephants, the operation is probably feasible, and there would be room enough in the wilderness of lands such as Canada or Siberia to organize an ideal home-place for the resurrected creature, and maybe create a family environment.
In my native Australia, there are two fascinating candidates for de-extinction. The first is an amazing creature that was last seen as recently as 1985: the Gastric brooding frog.
The other perfect candidate for de-extinction is the Thylacine, or Tasmanian Tiger, which became extinct in 1936.