As an additional comment - my RIM node does not have a Proxy service installed on it, it is simply the repository service and engine service. I believe if I set up "Load Balancing" under my Central Proxy and Central Virtual Proxy, then the Central Proxy Service running on my Central Node will handle authentication and then automatically load balance following that authentication among the RIM Nodes and Central Node.
I am not seeing resources being utilized on anything other than the Central Node, however. I was led to believe it was a random load balancing, so I should be seeing utilization on the RIM Nodes. Is this true?