We understand your concern. Most of us have the same problem. Don't box yourself into a corner thinking that you've got to have everything figured out before surgery. This is an on-going process of learning and behavior modification. In some ways, our new "tool" is the teacher, i.e. dumping or foamies UGH! In addition, find local support groups. Mine has a speaker every month and lots of people with whom to discuss the ins and outs of life after surgery. Start going to those meetings now. Take advantage of every learning opportunity provided by your doctor's office. You never know when an "aha!" moment might hit!
Most of all, if your insurance covers it, try going to a counselor that specializes in eating disorders. It's even better if you can find one with bariatric experience. I plan on seeing a counselor to work through my food issues, because, like you said, that's how I got here.