Me -Yes 5 times. Don't even worry about it. They usually are very compassionate people at the detox. You'll just be around a few more alcoholics going through the same thing.
They will give you some meds to help ease the withdrawals. You'll get to watch TV, probably sleep your first day. 3 meals a day. They will probably brings AA meetings into the detox so You will get a taste of how AA works.
Bring some nice warm comfy clothes. It will be chilly in there. Slippers.Everyone usually wears sweats. Bring unopened packs of cigarettes. They will check thru your suitcase. It is pretty laid back, not even something to worry about.