You always have to be prepared to deal with the unexpected when traveling. Even with all the extensive planning time you put in, the extra loot you dropped for travel insurance, making all the necessary reservations, there's just nothing you can do when your plane simply doesn't work. We sat on the Delta plane for over 3 hours and they would not let us get off the plane. They mentioned that if we do decided to hop off the plane, there's no guarantee that they will let us back on, which was bullshit. Anyhow, we ended up missing our connecting flight, and then arrived to St. George 4 hours behind schedule resulting in us not being able to go into the Narrows of Zion. This was one of the things I was most excited for coming into Zion so I was pretty disappointed that we couldn't hit it. We made due with what we had and just explored around the park and surrounding areas.