I have heard that they might not have enough protection from the frost/thaw cycle,
If you plant them at the suggested depth for the size and variety of the bulb, they should be just fine. Heaving from the freeze/thaw cycles in colder zones like ours doesn't come into play for bulbs that are 'buried' down in the soil. It is more likely to happen to plants that are small, or shallowly planted, or planted very late in the season. Example, bearded irises will heave out if planted too late and they don't have enough time to root in before the ground actually freezes.

I did actually have some daffodil bulbs heave out of the soil last winter though. I was hurrying to get the last of them planted and in my haste, some of them were planted too shallow. Some survived it and others didn't as the soil was not well draining, thus they rotted.

Your tulips should be beautiful.

Sue

I'm going to second what Sue said. Your tulips will be beautiful. I grow most of my tulips in raised beds in the veggie garden....

Watch out if you're planting by the driveway, if it's a spot where the snow gets dumped and there's a late snowstorm, the already growing tulips may be crushed by a load of heavy slush and snow.

enjoy,
Frank
(not an expert)