We are Diamond and sailed from Galveston 6 times since last summer. We have 10 AM boarding time, and are generally in the "Carnival Corral" by that time, on board the ship around 11:15.. The nice lady who checks our passport in the terminal says the cabin will be ready for us when we board, but we know better than try to access the cabin before noon. We go muster, find a bite on the lido, a couple of Fun Ship specials, then head to the cabin to DROP OFF carry on stuff. We know the cabin is in process, so we put our stuff in an empty closet and sneak out. If the cabin key is in the mailbox, the cabin is ready. If not, it's Funship Special time (again). Our room Stewards have NEVER given us the stink-eye for dropping off carryons.