Storing white potatoes in water under refrigeration, which restaurants do by the bucketful, saves from the oxidation effect of turning brown-ish purple. Sweet potatoes will suffer the same fate if not stored in water in a cold temperature. If you drain them well through a colander and turn them out onto kitchen towels before roasting, you'll be just fine. After all, you're going to roast them, right? At a relatively high temperature, right? Have no fear. Happy Thanksgiving.
Hi CindyB, I would store them in water and refrigerate them to prevent them from drying out overnight. Just be sure to dry them really well before you roast them tomorrow.
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