The main Expert double-door can be opened by lockpicking it or hacking the advanced terminal beside it.
There are several mirelurks and mirelurk egg nests around the area. Your main objective is to reach the upper room to the NW. You have to first reach the broken walkway to the SE then use the large pipes to walk around and reach the room.
The room has a red steamer trunk, some loot containers, and an issue of Tales of a Junktown Jerky Vendor on the table beside the terminal
From that room, follow the pipes again until you reach the walkway to the south connecting the walkway leading to the rooftop exit. Continue to the rooftop to find two rooms. One has an advanced door with a toolbox inside while the other room has a latch barring the door. Shoot the latch to open the door. Inside, you'll find a duffel bag. Access the terminal and eject the holotape to get the Gwinnett Stout Recipe.