You might also look into cabins at Fort Wilderness. They sleep six adults and some campsites allow dogs (for a small fee). But you will have to leave your dogs all alone all day long. And the Disney kennels (there is one at each park) are nice and fairly inexpensive (less than $10 a day) but you are required to walk your dog twice a day (three times a day for puppies). The kennels at Epcot offer a dog walking service for $2.50 a walk. And the kennels are not set up for overnight boarding, but will do it for a fee.
If you choose to get a pet sitter, make sure you check lots of references and leave contact info for you and your vet. If you board your dogs, I would recommend boarding it with your vet (or a boarder your vet uses/recommends). I boarded my dog with my vet recently for $26 dollars a day, and they are staffed 24 hours a day, they played with my dog, paid attention to her, and walked her.
If you are ready to attend to your dogs during the day while on your vacation, take 'em to Disney with you! (Also remember that in Florida you need proof of not only Rabies vaccinations, but Bordatella in order to board your dogs) But remember they will be caged or crated most of the day. If you would like to be able to enjoy your days without worrying about your dogs, talk to your vet about boarding them.