OK, now a question about luggage: I see a few folks saying "absolutely no hard sided luggage" and "don't bring suitcases" (though no restriction is mentioned by the folks at Blue Manta). I only own either check-in size soft-sided suitcases, or a hard-sided carryon bag.
Given the list of dive stuff I need to buy for this trip (need or want? heh

), I'd like to avoid also adding the expense of new luggage or duffels (something that would be a cheap roller duffel on Amazon US is about 3x more expensive here in Australia). Is it really not possible to bring a hard-sided carryon, or a soft-sided larger luggage? If it helps, I snagged myself a solo occupancy, so I hopefully won't be infringing on a bunkmate's space