It’s not bad, but the advantages of snow-birding between Pennsylvania and Maryland are not that obvious or economically advantageous.
Summer in PA, with an almost constant cooling breeze, and Winter in North Carolina, somewhere not too close to a houseful of noisy kids; yeah, I could sell me that.
If you ever decide to pursue the concept, the NC Forum regulars can help you find a place that suits you.
Union County is nice ... and it only takes a half mile or so before you’re out of range of the shrieking here.
There are very affordable new construction 3 br 2 ba homes about ten miles inland from the southern coastal NC beaches, $130K or so, popular with retirees. Subtropical climate with palmetto trees and seldom any snow, but it can get cold at times. Doesn’t get very cold or stay cold long, though, otherwise the palmettos couldn’t survive. Communities off the top of my head, Leland, Supply, Boiling Springs. There are others, just can’t think of the names right now. Nearest city would be Wilmington, NC or Myrtle Beach, SC, depending upon location.