Well, my blast of requests has resulted in 3 people getting back to me. I've reached out to two of them who are sending rental contracts. I did have to rent these apartments for a full week rather than for a day, but because the hotel I originally had was so expensive, I will actually pay less. This also gives us the ability to arrive a day or two earlier and use apartment as a base of operations from which to explore southern France and possibly even northern Spain.
I won't count on anything until the agreement is signed and the deposit made, but hopefully this room situation is taken care of.