Good luck with it - I wasn't diagnosed for three years and dropped to six and a half stone as I was only 24 at the time - All it took was a sonogram to diagnose me, but the docs INSISTED I was anorexic, as I was vomiting after every meal - I mean, Hello, major symptom of bile duct getting blocked is vomiting!!!!! Cue blushes when they discovered I had masses and masses of little stones in my gall bladder after the sonogram!!
I wished I had known how to insist about having the thing taken out earlier, before I got so thin, and was in agony for so long.
I found recovery from very quick lap op very good - most painful was getting a stitch out in my navel a week after surgery - the very young nurse was a bit of a klutz / nervous, but my friend had told me to take a paracetamol before hand so her fumbling wasn't so bad.
It is important to remember that the less time you are under anaesthetic the better and the smaller the wounds the better. Also important is to stretch and sit up straight as possible afterwards.
BTW Most docs can't preform open surgery as they are all highly trained with the laps technique - any surgeon who can preform open surgery is probably well past it medically, and hasn't kept up with training IMO!!
You'd probably get a stent after full open surgery also, so not too sure about your fear about stent coming loose with lap......
Hope it all goes well with you!