want to go to Disneyland, then don't get the $50 annual fee card. At 1% cash back you have to roll $5000 through the card annually to make the reward worth it ($2500 at 2% locations). With the free card, you can use it whenever, and stop whenever without cancelling your credit line (and paying perpetual fines).
We decided for the "near long term" that we wanted to do multiple Disney trips, so the 2% card was a no brainer.
As I said below, the only reason NOT to put it all on tickets is to save $$ for souvenirs and food. It's fun to go to Disney for 4 days and not spend a dime. That's worth it to me.