It’s easy to pack when you know where you’re going. Like, for instance, the beach. When you go to the beach, you pack your towel, your swimmers, your sunscreen…and so on.
According to the movies, time travel is incredibly, unbelieeeevably dangerous.
The main risk when it comes to time travel is that somehow, you end up becoming your own parent. Or – even worse – your own grandparent. Ick.