Help with Custom Categories & Taxonomies

Hi,

Am hoping someone can help me pull out a single custom category name and show it on my custom post page.

Basically, I’ve created a new custom post type ‘Itinerary’ as well as some new custom categories:

Experience
– Water Sports
– Hiking Adventures
– Mountain Biking
…
Destination
– Australia
– Canada
– South America
…

Each Itinerary has 2 categories applied to it, for example:
Itinerary ‘Coastal Walks’ is categorised as Hiking Adventures and Australia.

I would like to display in my custom itinerary page the name of the Destination
e.g. Region: Australia (or whatever destination is selected)

I’ve tried using this:
<?php echo the_terms( $post->ID, 'trip_cat', 'Region: ', ', ', ' ' ); ?>

which displays all the categories selected – however I’m trying to display only the child of the parent category Destinations.

Is anyone able to shed some light?

??