As you are facing the Mark Twain Riverboat (or the dock for it if it is out) the distribution is just to the left near the water.
The day we picked for Fantasmic, the machine was down so they were hand writing the FP for each person. It ended up being a nightmare - they apparently gave out too many and when we arrived at 8:10 (for the 9:00 show) there was no more room in our assigned section for our group. I don't mean comfortable room - I mean no room at all. People were packed in like sardines! It worked out in the end, thanks to a kind and helpful CM, but it made for a stressful 20 minutes until we were able to find somewhere to go.