I know that you already have gone through the IEP process. I don't know whether that process was straight forward or more adversarial. So here's another thing that I meant to mention but you may already know -- put everything in writing. I usually send the school an email agenda listing topics/questions that I would like to address at the meeting and invite school staff to circulate additions to the agenda. If you make it clear what you would like to accomplish ahead of time, staff is more likely to come prepared to respond to your requests. If you go in expecting the staff to just "know what to do," I think that you will be disappointed unless this is a group with lots of experience with 2e kids.
Also, after the meeting, I circulate a copy of my notes from the meeting including identifying responsible parties and deadlines for actions agreed at the meeting, i.e. Ms. Smith, literacy specialist, will administer the GORT and report results to the team by X date. I also discuss when the team will meet again.