The only thing a float test will tell you is if an egg is old enough to have lost enough moisture to float. You can leave an egg in a hot dirty nest for three days and it won't float, but it could be teeming with bacteria. I don't eat anything questionable. On the other hand, my birds don't...
They're fine. Bring them in and put them in the fridge so that they can slowly warm up to fridge temp, then eat starting tomorrow. If any are cracked, feed them back to pets.