Read this first:
Flour mites are tiny pests that infest dry goods such as cereals, pancake mix, dried vegetable materials, cheese, corn and dried fruits. They can thrive in the cleanest of kitchens if the conditions are right. A humid, dark, and warm pantry is the perfect breeding ground for flour mites, which usually get into your kitchen either already in the foodstuffs or hiding on the packaging.
The other risk is that quilts stored for long periods of time are more susceptible to critters interested in food. Even though these items are washed, the just become more attractive to bugs. Just saying.