okay digging up an old thread, but no one has responded...
yes i did a course last summer in NZ, would highly recommend it. You can easily get work doing a season after, or if you are off to uni, like i was, 5 or 6 weeks work during your vacations working on school trips (pay isn't bad)
Where are you thinking of going? If it is New Zealand I can offer quite a bit of advice as to the best courses ect.