Can I use a larger crockpot than what the recipe calls for?

I have a large 7 quart crock pot that I bought for making lots and lots of soups. Now I would like to start using it to cook other things. However, most of the recipes I'm finding say to use between 4 and 5 quart crocks. What will happen if I use my larger one? Will the food dry out or do I have to shorten the cooking time?