Aircrew buddy if mine was telling me there's some kind of rule that aircrew are supposed to get individual quarters when on the road for sleeping. I guess like single person hotel rooms? Said there was quite a bit of drama when people were told because of the budget they would likely be sharing rooms when possible.
It really depends on your Wing/Sqn policy and the current financial climate. Generally, when on the road, you get your own hotel room. However, I have recently ferried a Sea King across the country and it was shared rooms the whole way because of budget concerns...
On a ship, nearly nobody gets their own cabin. The techs are in 19 mess, which has about an 18 rack capacity (and is right over the propellers, making it arguably the worst mess on the ship for noise and vibration). The aircrew officers often get shoehorned into cabin 6/8 which has 6 racks. This at least has the virtue of letting them control their own crew rest situation, somewhat.
The upcoming classes of ships (I am told) will be much closer to a commercial standard for Accomodations for all ranks.