How cold can it be at night to plant fruit trees?

Hi, I'm in 7b, Atlanta, GA.  It's ok during the day right now, but at night it gets to 29 some nights.  I'd be safe to plant them in the day, but I wish I had a stretch of nights that were in the 40s or 50s.  I'm afraid my heeling in isn't right, and while the trees are brittle or anything, I am afraid if I don't plant them they'll die.  I'm afraid if I do plant them, while the nights are cold, they'll die.  Leave them heeled in?  Plant?

They are chickasaw plum, fuyu asian pear, stella cherry, persimmon, and a few apples.  They are 3/4" on some, but some are smaller, maybe 1/4".  A couple of them are an 1" at the union.  I have 10 trees and they cost a lot of money.  Any advice is appreciated.

I was going to rent or buy an auger for planting, but maybe I should wait?

Thank you for any advice.

Sounds like they are bare root.  I would go ahead and plant them.  If they starting leafing out and you get a hard freeze then cover them with frost cloth after watering. If the buds are small and tight they can handle the frost but when they start spreading out they become more fragile.  I am in North Alabama also 7B.

i’d plant them asap. they’re dormant, right? no leaves? they’ll be totally fine getting frozen a bit on top if their roots are in the ground. i plant in colder weather all the time. it’s totally fine.