Usually, if you do a balance transfer or direct deposit into your checking account, you don't earn any "points" to whatever you get with your card, but you would if dvc charged the balance to your card. And transaction fees can be high. And you can't deduct the interest, and your card has the right to apply any and all payments to the interest-free part of your balance and let anything else rack up finance fees.
If it were me (and it probably will be next year) Wait until you have the $$ to pay it off, have DVC charge your balance to the card (earning points) and then pay it off that month. If you don't have room on the card, have Disney make a couple of smaller charges (they did that for me before).