GC3P2YG - Caching Around the Big Island Challenge is possible.
But border polygons for the districts are needed. If the exist on the open street map they can be extracted else someone have to create them.
GC4NWXB - Xenolith - an A to Z Big Island Challenge is impossible because the series part of a name cant be detected
"Also ignore cache names beginning with Series name. For example, a cache named "Birthday Series #16, A Fishing Boat" would be considered as having the name "Fishing Boat" for the purpose of this challenge."