Follow-up:
I had a long talk with the Hotel Director yesterday, who advised me that what happened was the product of misinformed security personnel and confusion that arose as a result of them not having any formal EV policies.
Based upon my letter, he investigated all of the companies' 22 affiliated properties and learned that only 4 had charging facilities. He has indicated that he is taking this issue very seriously, and will immediately begin implementing policies to ensure that EV customers needs will me met. He has indicated that he will keep me apprised of his progress, will attempt to formally open up the standard wall outlets for use in the interim, and hopes to have formal pro-EV policies in place by September. He even reached out to Tesla prior to our conversation, to find out the details of their equipment installation program and confirmed that their facility was prewired for EV charging that had not yet been implemented.
Major kudos to Robb McCreary -- the hotel director -- for taking these issues seriously and for talking this issue head on. I wasn't expecting a response to my letter at all, and instead found a hotel director who listens and cares about his customer's issues.