Tylenol is the basic pain-reliever of choice. Then you can move onto the narc-tylenol combos for severe pain (vicodin, perccocet, tylenol 3, etc.). I also use Tramadol for pain relief, but it doesn't work for everything.
Now, just to be fair, not everyone dumps. Some do, some don't. I don't. Never have. I can eat a candy bar without any issues. However, some people would be on the floor writhing. It just depends. And there's no prediction as to who will dump and who won't.
Some choose the RNY specifically for the dumping.. knowing there was a serious consequence for eating bad food. That's a personal choice you need to make.
I will let you know that a surgeon will not recommend a surgery they don't perform. So if you surgeon doesn't do the DS, you won't hear about it from them. Also, they will most likely tell you that it's bad for x or y reason, when they are just trying to sell you on something they do. It's a sales presentation. I wouldn't rely on your surgeon to make your choice for you.. *you* need to do the research, figure out the questions to ask, maybe see a 2nd surgeon, etc. It's your health, and you need to take charge of it *now*.
If you have any additional questions, just PM me. I don't mind helping out.