And you are forgetting that the Timaru ENZED meeting fits in between Ruapuna and Teretonga, Look there is plenty of people with storage / workshop space available, likewise bed space just the same as it was when we were all competing seriously in our younger days.
Just like the old days if you need to duck home between Chch & Timaru someone will bring your rig south & store it for you and we can be pretty sure that one of the southerners will get it to Invercargill if you need to go home again. For those who stay and make it a vacation well you just never know who might be able to take you up river in a jet boat or out to the river mouth trying to catch a salmon, then there is the lakes too along with a short time in Central Otago or down through the Catlins.

Try it, you may never want to go back home again