Yeah, coming away with clonidine and benzos is better than usual.
Typically, IME, the opiate-dependent are considered the bane of the ER dr/nurse's existence.
IME, they immediately treat me like a junkscumbag and either toss me out or stick me in a bed and forget about me. I've had multiple experiences of going to the ER for real problems and told them upfront when they asked that I take buprenorphine and that I do NOT want any opioids. Once, the doc wouldn't even give me a script for lidocaine (as in Anbesol) eye drops when I got a burn on my cornea. (The pain was bad enough I was seriously considering robbing a pharmacy at knifepoint or killing myself. I settled for pounding a liter of vodka instead with antihistamines, willing to take the risk of death. A cornea burn! Luckily when I woke up it wasn't suicide-painful any more, just excruciating.)
Sometimes after overdoses I've gotten ativan, ambien, or clonazapam -- mainly because the nurses were getting annoyed that I wouldn't stop screaming. But on other occasions they've done some pretty messed up things after ODs (like naltrexone for hours at doses so high I was too incapacitated to yank out the IV, try as I did, approximating full ultra-rapid detox--without my consent--of course, I'm happy to take a reasonabl amount and suffer to live, but after 8 or 10 hours it seems like the dose could be turned down a bit; and they didn't need to use whatever weird little metal thing it was to insert that catheter--while I tried to fight in a stupor/semi-seizure, mind you--that caused visible bleeding; or, another time, trying to trick me into staying by saying I had life-threatening organ failure, which I believed until I found two other docs on the floor and asked them to explain it to me again, and they said you're fine).
Even though I now take opioids as prescribed, I avoid hospitals like jail. I would have to be gut-shot, and even then I'd probably try to take a bus to Mexico...
You could always deny that you have any opiate experience or say you're a benzo addict, I suppose...