We visited here with a tour offered through the Disney Cruise. We got there in the morning a little past 8 am and there was already a long queue of different tours waiting to get in. We apparently have a priority access over the other tour groups, and able to cut through the lines without waiting. When I check online later, there are priority first entry tickets to get in 30 minuets before it opens. But you will need to get there early and pay the extra charge ahead of time. You get to finish early. We went through the Vatican Museums, Sistine Chapel, the gardens and St. Peter’s Basilica in just half a day, done before lunchtime. And that is as much as our kids can tolerate and still enjoy the tour without whining or meltdown.