The Chilean volcanic ash cloud is just the latest in a series of unpredictable and uncontrollable events which have occurred during the build-up to the festival's official opening, on June 24.
Speaking to the Otago Daily Times yesterday, Mr Green said festival organisers were focusing on the things they could control - but the things they could not have caused the most worry.
The first problem the organisers faced was the lack of snow, which meant, to date, no southern skifields were open for business.
Although temperatures dropped on Wednesday night and Coronet Peak was able to make snow, no opening date had been decided on - which could jeopardise the first festival events at the ski area, scheduled for next Saturday.
"If the field's not open, we can't run those.
"We've had a couple of days of cold weather and snow is forecast for the mountains, so they should, hopefully, be open next week," Mr Green said.
Throwing another spanner in the works was the volcanic ash cloud, which had been disrupting flights all over New Zealand and Australia.
While Mr Green was confident the situation would right itself by the middle of next week, his immediate concern was getting Peter Lynch from Brisbane to the resort to install the temporary ice rink over Horne Creek in Queenstown's CBD.
The rink arrived earlier this week and construction was due to start today but, with the ash cloud lowering over the southern South Island yesterday, it was a waiting game to see if Mr Lynch's flight would make it to the resort in time.
"It's changing every day. We have a lot of people flying in to attend the festival or to be on stage as entertainment.
"No-one can obviously plan for it. It's just one of those random acts of nature ... It's not a major for us until Wednesday or Thursday next week."
Also causing a problem was the "Cinderella" carriage, which was to sit beside the ice rink so people could have their photos taken in it.
The carriage left India by boat and made it to Lyttelton, but the port was badly damaged in Monday's aftershocks and Mr Green was still trying to find out where the carriage was.
"The boat is in Lyttelton, but the port ... has been quite badly damaged, so you can imagine what that's like.
"Their big crane got broken off its rails, but there is other infrastructure they're putting into place.
"International freight companies are trying to track down where specific bits of their freight are at the moment."
Mr Green was optimistic the carriage - which would allow people to "pretend they're Wills and Kate" for a photo - would make it to the resort in plenty of time.
However, two alpacas would be missing from the front of the carriage.
Festival organisers had planned to have the animals with the carriage for photographs, but an "alpaca conference" was being held in Nelson at the same time as the festival and no alpacas were available.
"Who knew? I don't know if the alpacas attend the conference or not, but none are available," Mr Green said.
"We could ring Santa Claus and see if he's got any reindeer we could borrow, but they wouldn't get here because of the ash cloud.
"We can but laugh."
