We're going to WDW in Sept, and I got the Visa just for this occasion (and through a shareholder promotion, got a free Mickey Mouse watch).
Here is my plan:
1) use other rewards cards for everyday purchases to build rewards. Some give 5% on gas purchases, etc.. Then, redeem those rewards for extra cash for the trip.
2) use the card ONLY for charging my WDW trip. THEN, take the money that will pay for the trip and put it in a 6 to 9 month CD (quick way to get some rates:
www.bankrate.com). So, if my trip ends up being $4000, I'll get something like ($4000 * 5% * 0.5) = $100 in interest before it's all said and done. Not a huge sum, but if you are trying to squeeze every little drop you can... That's $100 in interest for about 30 minutes worth of 'work' (getting the card, setting up a CD, etc.). If my job would pay me $200/hr, I wouldn't be having to squeeze so hard.
3) Now, I have the card to get into a Meet'n'Greet or other thing (was there in 2005, and they were letting 'special' people go into Soarin' for a preview. If I would have had the card, I would have tried flashing it to see if they would let my family in.)
A previous poster was right when they mentioned that the reward is pretty bad. Not only is it only 1%, but it is also limited to Disney-related purchases. I can get 1% from Citibank, and it's cash that I can spend ANYWHERE. Personally, I think they should give some incentive--like increasing the reward OR making it possible to get things at a discount when using the reward.
ONE MORE "BEWARE": if I read things correctly, if you have a balance for your vacation that is 0%, THEN you charge additional things--which will NOT be 0%--THEN, you make a payment, that payment is going to go toward the lowest-interest balance. In other words, you will pay off some of your 0% vacation balance while leaving the new purchases to build up interest at XX%. This is a very tricky thing that credit card companies do with balance transfers, etc.. it is also one reason that the only charge on the card will be my DIS trip.