Several of us learned last March 29th that putting a sheet alone over them actually invites more harm when a rapid but short freeze period occurs. At least that was true of full bloom and tiny fruitlets.
This page from Clemson has a good pictorial description of what temperatures are harmful to peaches at various stages.
If you are nervous about what 29 degrees or so will do this weekend, wait until you see your Atlanta forecast for next Tuesday and Wednesday, which predicts low’s of 24 and 22 with a high on Wed of 39. 
It might surprise you how hardy apple buds are. At least for the colder overnights coming up you won’t be going straight from steady warm temperatures to very low ones. There’s some cooling in between to slow down those life juices in the trees.
This is early Feb on the eastern half of the country. We’re more likely than not to have at least a couple more nights below freezing before we’re frost free. When Nature gives us more than we can protect them from, and she will do that repeatedly during your growing years, it stings. But it also makes the successful crops all the more appreciated. I’m saying this as much for myself as for anyone else, since I’ve already had some apple blooms starting at the end of December which, of course, did not take well to January lows. Now I’m still working on convincing myself that if the fruiting trees wind up losing everything to freezes this year because of all that early winter warmth, then they will not have to expend resources maturing the lost fruit. So, they will be able to use those resources for growth to provide more bountiful future crops. Plus, if the fruit pests lack food for the year, there may be many fewer of them next year. Que sera, sera.