Same here in KY too. For the past several years, everytime my huge azalea goes to bloom it gets cold and a frost gets the buds except for the ones under the eve of the house. I cover it with a big sheet, but it normally doesn't help much. Its just loaded this year, with a few just starting to open. It figures. But I will still cover it and try to save them, along with the blooms on my Apple twig.
Kim