SSIS: What services to restart so Folder Permissions Propogate to username executing pacakge?
We were able to get the changes to propagate by restarting just the 1 service that was being used by our DWH (under the username we wanted to give access to). So I guess the answer to my questions is that you only have to restart the 1 specific service that the username invokes when running the package. Restarting the entire server was not necessary.

I would have liked to have written a more detailed answer but the process was done by someone else and I was just watching as they did it so I did not get a chance to see exactly what service they restarted but I recall seeing Data Warehouse in the service name.