Concerned/Fruit Trees/Cold Front

I'm in central Alabama (Shelby County)... we are looking at high 20's to freezing the next few nights. Most all of my fruit trees I have planted have bloomed or are blooming... with this cold weather... should I do "anything" to protect them of just, let it ride? New to this so I appreciate any feedback.

If it hovers around freezing with a breeze they will probably be ok. If it frosts on them, probably be a wrap.
Small trees? How long have they been planted?

Bought larger size, but only been in the ground a couple of months...