Not sure if this is the correct place for this...

I am considering Non-reving from HNL to TKK via GUM in October on CO Mike. Does anyone know how full these flights get? What are my chances of getting on the flight? I understand they are few between them, so should I plan on flying out earlier than I need, or do I have a good chance?

Basically, I'm getting a reduced ticket, but only can fly if there is room and not weight restricted. I'm planning on going a diving trip. I've just started looking at availability and it seems available right now. Will seats fill up closer to the travel date?

Help!