I know that this is not the answer you want, but the wait times vary greatly depending on many factors. I'd go with the hope that it would work but have a Plan B if it doesn't. There are two other fantastic options at the Poly: Tambu Lounge, which is connected to 'Ohana and has the famous Lapu Lapu (see my profile pic) and the outdoor Tiki Terrace. We prefer the Tiki Terrace to Trader Sams anyway. It has either the same menu or something that is really close, a waterfall, live entertainment, beautiful surroundings, and a view of the castle if you're sitting in the right place.