Thanks! I think parsing the log file will be a good option for me. I should have thought of that!
EDIT: I should mention that the client side log files are found at C:\ProgramData\VMWare\VDM\logs, and it doesn't include the messages you were talking about (I'm assuming those messages would appear in the server logs). There are, however, some things in there that I can use, such as "Remote USB Status reported, state: available".