Another vote for rope drop. We went last Saturday, arriving at the park entrance maybe 5-10 minutes after EMH opening. Most of the crowd goes to FoP, so Navi is an easy ride. The sign said 20 minutes when we got to Navi, but it was walk on. We decided to do a second ride right then and by that point the queue had built a little, but it was less than a 15-minute wait.