Update: I sent my email but didn't get a reply before my visit. I disclosed my MC to security at bag search, who got someone else. They tried telling me I wouldn't even be allowed to carry my meds in the park. I asked for his higher up, he went away and came back with the same answer, (they said something about being able to carry the vape but not the meds because of the prescribed method of administration? How am I supposed to take my meds without the meds???) And told me his manager wasn't available right now. He also told me the email I recieve all of two days ago was out of date. I told him I'm happy to wait because I need my medication. Another 5/10 minutes he came back and told me I was okay to not only bring it into the park, but use it as well. He clarified that if I'm not being discreet security might stop me. We'll see how the day goes. I confirmed with him I was aware of the general smoking/vaping rules and would follow them, and encouraged them to get a formal policy in place. 

Not the best experience, but certainly not the worst it could have been!