Note this won't work for everyone. If you are willing to take credit hits (some aren't) you can make a pretty cost efficient trip to DLR. We first (my wife & I separate) applied for the Southwest cards that offers 2 Roundtrip flights with SW after 1st purchase. We made our purchases in Late Feb. and by early April we were able to book our flights. There is a catch, you may have to pay an annual $79 annual fee. The reason I say may is I was able to call and have mine waived for the first year however, she was unsuccessful. So we actually have 4 roundtrip flights for the $79 annual fee of her card. Like I said it probably depends on who you get on the phone from chase whether you can get your annual fee waived but worth a shot nonetheless. They say on the Southwest page 2 roundtrip flights is only a limited time offer and in Feb. they were only advertising one so I'd jump on it considering the flights won't expire since they are distributed to you via rapid reward points.
Next,
I left my job at an IHG hotel so I lost my employee discount so were scrambling for hotel rooms and I stumbled on the Marriott Premier Chase Visa offer. Can't 100% recall what the offer was but we have 7 or 8 (depending on the tier of the hotel you select) free hotel nights at a hotel about 5-6 miles off disney property! NOTEThe Marriott's close to the gate aren't eligible for the 7-8 free nights as they have tiered the hotels based on I assume amenities and proximity to major attractions such as Disney. So if you want a walking distance hotel odds are that at the most you could get 1 free night with this offer Call chase beforehand to find out all details as I am vaguely describing it. This card to has an annual fee but it is waived for the first year and you can cancel the card after 6 months so pretty much at the cost of a little hit on your credit you can get 7-8 free nights at a Marriott hotel. Make sure not to cancel this one before 6 months or youll be subject to paying the cost of those hotel rooms.
Like I said call Chase for details before applying. I'm not here to debate whether it's worth it for each individual person to apply to take the credit hit for the credit inquiry just passing along some info that may help others. I also think your credit has to be at least average to be accepted by Chase. My Marriott offer wasn't automatically approved it had to be reviewed so if that happens to you I urge you to call them and sell yourself on why you can handle this credit card it may help you get approved by them.
If you have children (we are expecting but won't be here by the DLR trip) you'll still have to pay their airfare.
In conclusion,
This won't work for everyone because they don't want to take the credit hit or they want to stay within walking distance to DLR. It works for us because we found out after we booked our trip that we're expecting (can you say budgeting) and with my wife expecting she doesn't want to walk anymore than she has to and would rather drive to the parks.
Next,
I left my job at an IHG hotel so I lost my employee discount so were scrambling for hotel rooms and I stumbled on the Marriott Premier Chase Visa offer. Can't 100% recall what the offer was but we have 7 or 8 (depending on the tier of the hotel you select) free hotel nights at a hotel about 5-6 miles off disney property! NOTEThe Marriott's close to the gate aren't eligible for the 7-8 free nights as they have tiered the hotels based on I assume amenities and proximity to major attractions such as Disney. So if you want a walking distance hotel odds are that at the most you could get 1 free night with this offer Call chase beforehand to find out all details as I am vaguely describing it. This card to has an annual fee but it is waived for the first year and you can cancel the card after 6 months so pretty much at the cost of a little hit on your credit you can get 7-8 free nights at a Marriott hotel. Make sure not to cancel this one before 6 months or youll be subject to paying the cost of those hotel rooms.
Like I said call Chase for details before applying. I'm not here to debate whether it's worth it for each individual person to apply to take the credit hit for the credit inquiry just passing along some info that may help others. I also think your credit has to be at least average to be accepted by Chase. My Marriott offer wasn't automatically approved it had to be reviewed so if that happens to you I urge you to call them and sell yourself on why you can handle this credit card it may help you get approved by them.
If you have children (we are expecting but won't be here by the DLR trip) you'll still have to pay their airfare.
In conclusion,
This won't work for everyone because they don't want to take the credit hit or they want to stay within walking distance to DLR. It works for us because we found out after we booked our trip that we're expecting (can you say budgeting) and with my wife expecting she doesn't want to walk anymore than she has to and would rather drive to the parks.
Our cards give us money back so we use them all the time for everything including DLR. And pay it each month. We would never dream of taking a trip if we didn't have the money to pay for it in the bank. Although I didn't get the impression that the OP was saying to put it on your card and just make payments. It sounded like he just got a deal with his card company. 
