Some of the posts are correct. If Mesa/Go leaves Mokulele is on its own. However; if you do choose either one both have a STRICT contract. If you break it you better be ready to write out a check.
The thing with flying in Hawaii is that these two carriers do depend on tourists. Go! is the feeder carrier to Mokulele if they pull out where will Mokulele gets its pax? I suppose they can survive a little while being that they also operate air tours.
Either way, if you get desperate go to ameriflight and build some multi time why fly sinlge engine turbine if you already have time in bigger things. I used to fly C208 but have since moved on. The time isnt that great on a resume, I've learned multi time is little more respectable. Just my .02