Lesli, from what I understand, a yamadori tree is a tree that has been taken from the wild. Supposedly the earliest bonsai were trees collected from Mt. Fuji and other mountains/volcanoes in Japan, taken into the cities in bowls and grown. These were called hachi-no-ki, or "potted trees". Later the shallow tray became popular, and so it became bonsai, or "tree in tray". Here's the full history:
en.wikipedia.org/wiki/Bonsai#A_concept_and_early_versions
Joncoh, it looks good! I agree, you probably should wait until the tree recovers from its journey before you do anything else. When it does start growing again, though, you can probably start working on the nebari and some initial styling. In the meantime, be thinking about what you want it to look like, and good luck!