I tried the brine recipe from Kellyguinn:
BRINE
1.   2 QUARTS WATER
2.   ½ CUP KOSHER SALT
3.   ½ CUP BROWN SUGAR
4.   2 TB GARLIC POWDER
5.   2 TB ONION POWDER
6.   ¼ CUP APPLE CIDER VINEGAR
After soaking for a day, I dried the turkey breasts off with paper towel, then added some kickin' chicken rub and let sit until charcoal grill was ready. While cooking, I applied butter to keep from drying out. Turned out really good.