Only three campsites left on the 30th: one because a tree fell on their tent; one because they had to return to Wellington; and one because they had camped in a dip, which flooded due to the rain. This was the only campsite which had to leave because of rain.
The remaining campsites on the 30th were limited to three: one ruined by a fallen tree blocking their tent, another necessitating an early departure for Wellington, and a third compromised by camping in a low-lying area that became inundated with water following the downpour. This site was the only one compelled to leave due to the rain.