I always do WDW with cash- hate the credit cards, though I do use one for the rental car, but I have the money put aside to pay when we return. I understand your struggle with credit card debt, it is a choking feeling.
Interestingly, I am trying to put a trip to the UK together also. My sister used to live there (she now lives in Australia) we are planning on meeting in the UK with the kids for 2 weeks. I am hoping to put together a deal where I can trade my house, or time share, for a house in the cotswalds. This would eliminate a hotel bill, minimize a food bill- as I'll have a kitchen, and eliminate my car rental if the home comes with a car. See if this option could work for you.