I've run this a couple of times. I improved the handouts and create more. In the PDF linked below you will find enhanced handouts from the scenario as well as Inpatient Admission Form, Patient Psychological Profile form, Ink Blot testing cards, and extra notes that I came up with. When I played I took the Inpatient Admission and Patient Psychological Profile form and staple them inside a manila folder and placed a label on each one for each of the patients. This way it look more like a medical patient folder. If you get a hold of some medical folders it would make them even better but they can be costly to purchase.
If you're going to handout pregens I suggest having two doctors with hypnotism and pharmacy skills, a reporter wanting to do a story on Dr. Brewer, and the rest being relatives to the patients coming for a visit. I had Billings' Granddaughter and Barber's sister as the other PC connections.
Write up a couple of the NPC patients as PC characters so they can be used a replacements if a PC dies. Hawkins, Randolph, and Barber aren't to far gone to be used.
In the two times I ran this scenario, the first time would have ended in a TPK, but one of the players rolled a 01 to build a sea worthy raft to escape. The second time the players were able to successfully complete the adventure as written.