Correct. It can be unscrewed. Probably take 5 minutes. Not sure it will squeeze down to 5" X 5" but should be pretty close. Appreciate the thought but if you apply the money towards the freight it will really seem like a heck of a deal. P.S. The mattress is really nice, extra clean and feels extremely comfortable BUT have not tried to sleep on it. If you do not want it, we have someone that wanted the mattress only.
If this works out for you, I can photograph and print more detailed pictures on how to put all back together again and enclose with hardware. Which model Hilo do you have? Just curious.