We're going with these WH owners.
http://vacationcentralflorida.com/home.html
We are staying in #7682, in a 3 bed/3bath townhome with splash pool. They have reasonable rates, and while they may not be the cheapest, they do not require a security deposit (which would be in addition to your regular deposit). There is a $250 deposit upon booking and then you don't have to pay in full until 30 days before your stay. Many places require 60 days before. They also have a lot of extra Mickey touches around the house and the kids room is always Disney themed. They have a lot of Disney artwork and it's touches like this that make us still feel connected to Disney even though we're offsite.