Don't use batting. Minky is warm enough. I used batting once and regretted it from the get-go. It was much harder to quilt than when I didn't use batting and even though it was a "big" baby quilt, it was very heavy.
It will tend to slide around so use the spray baste and pin or baste also. Don't use satin stiches or any stitches that are too close together. The minky will pucker and look horrible.
Good luck.