Right now, we only have a small quantity of berries ready for drying. Later, we'll have huge flats of screens out, but for now this is my favorite method and it works for just about anything you'd want to air-dry.
The berries can be heaped on the plate to a thickness of about 1/2 inch. They will quickly dry down and separate, and I've never had any spoilage. The same can be said for most flowers or leaves. There is a lot of circulation, and open baskets are great for drying.
After a couple of days the berries are starting to look like tiny raisins, and they will continue to dry for a week or more, depending on the temperature and humidity.
When they have completely dried, keep them in a sealed container in a cool, dry place and you'll have plenty to get through the winter!