When you are on the universal studios side and you want to eat at IFF I would suggest checking when the fear factor show is on. I have found that when the fear factor show is going on then the crowds at IFF are shorter and within 5 minutes of the show lets out the restaurant fills up. So check for the show times.
she said she was going in september, maybe labor day time period, (before/after that)
if that is the case, Fear Factor would be closed if Bill and Ted's Excellent Adventure is held again this year for HHN.
no worry about FF crowds then filling up that restaurant.
Bill and Ted have been using that FF site for a long time for their HHN shows