Edit: Teleporting didn't work, but no-clipping over the fence did. ._.
So all has been well for little 'ol me in the Commonwealth. I just finished the Pickman Gallery quest, having collected a nice, new sniper rifle that did damage beyond what my current rifle did. Shoving this onto Nick, I gleefully return to Goodneighbor. I'm in survival, so I can't fast travel. I hit "E" on the door, and...and...nothing. A solid 4 minutes had passed with the loading screen. I haven't encountered a loading time this long before. I reloaded the save, traveled back, and once again, it keeps loading. I've verified integrity of game cache and uninstalled all mods I installed since I last visited Goodneigbor. I have the mod that re-enables the command console, and I don't know if that will work, but I'd prefer to find a solution that didn't require me to use it.