Thanks for the reply.

The problem with using the description field is that it won't work in the Hierarchy view will it? At least when I move Campsie to the Place Detail field the heirarchy still works, but I have to manually place the pin on the map so it shows the correct location.
It also means that I can't for example, have 12 Smith Street in the Place Detail field so that it appears under Campsie in the Heirarchy. I can only have 12 Smith Street, Campsie which then appears under New South Wales which is not really how it should work.
Likewise if I ignore it the hierarchy doesn't work right.
Any other options?