How do you say

My friends and I are planning a trip to New Zealand this summer vacation.

..in Chinese?

我和朋友计划暑假去新西兰旅游。

wǒ hé péng yǒu jì huà shǔ jià qù xīn xī lán lǚ yóu 。

How do you say "They plan to take preparatory courses over the summer holidays." in Chinese?