Guilds should get a hideout. Like a hub world they can enter into the Sea of Thieves from. From the Main menu you can choose to "Enter Guild Hideout" when they're IN the hideout, maybe a new Port-Town bigger than Port Merrick, and choose which ship of yours you sail to the Sea of Thieves by walking to it In the hideout and pressing "Set Sail" when interacting with the Ladder of said ship.
Then your ship sets sail with an animation into the Sea of Thieves with a destination you choose like Port Merrick, Morrow's Peak, Sanctuary Outpost, Ancient Isles, ect.
And your ship automatically shows up there, plays a quick 7 second cutscene where your pirate ship gets to the dock, pirate goes to the tavern has a few too many drinks, passes out, then waking scene plays and you're in-game.
