I think that, if the boundary of Hawaii is moved up and to the left, we should be able to have every island of Hawaii in one single region, instead of having them separated:
The red lines show what should be moved, and the green lines how would the boundary look like after moving it.
If you think this then contribute a solution, perhaps merging both squares in the image for the region so that we get the new islands and still have plenty of airspace around Hilo
@Samuel123abc, @The_simulation_nerd, @Lare and @CJ12, map number 1 is the original, featured map for the request, number 2 was enlarged to the right and down, and number 3 was extended further to the right, reduced in size at the bottom, and limited a bit the boundary region of Kauai, which one do you think is best suited for the region?