To dry blueberries you have to do a little bit more preparation. According to my dehydrators directions you blanch the blueberries briefly in boiling water in order to get the blueberries to crack. Then drain and load your dehydrator trays.
Dried blueberries are great for granola and granola bars. To throw into cookies and other baked items. You can use these in place of raisins for any recipe. The best thing about them is they store for a long time. And if they are dried properly they will not go bad on you. It seems like you don't get that many blueberries when you dry them but look at the cost. I paid $10 for these 3 pints of dried blueberries. If I bought them in the store I would pay almost $5 for an 8oz bag of them. So I did save a lot of money!!