As others have noted, Trader Sam's probably isn't in the cards for you before your 'Ohana seating. But don't despair! If it's a good tiki drink you're craving, the Tambu Lounge adjacent to 'Ohana will be open and can definitely satisfy your tastebuds. In fact, I think their drinks are actually a teensy bit better. You may not be able to purchase a souvenir glass, but you can take home a fun backscratcher. Or even better, enjoy my very favorite drink, the Lapu Lapu, out of a real pineapple. Then, visit Trader Sam's after supper. Not a bad compromise!
But the way, love the profile pic. We did the Segway tour too, so much fun!