They're making every effort to clear the snow! Last years fiasco was down to one single major error & they'll no doubt have learnt from that mistake.
An airport like DTV cannot justify investing loads of money in snow clearing equipment, and having been up at the airport a couple of days ago & seeing for myself what equipment they do have, they should be proud! If they can't open the airport because of snow, it's highly likely it's because the snow is still falling!