Yikes...
Nothing to worry about but that HOLE at the top... Living in Maine we often had a LOT of snow, often at least 50 inches.. In order to get to work, I shoveled it out of my way. I have pictures of the kids and their mom standing in the shoveled pathway, with the snow piled to either side WAY over their moms head.. SO.. I would dig out the shovel and the snowshoes. Snowshoe to the hives and fix the hole in the top situation.
Shovel the top of the hive clear. Install spacer, Fondant, inner cover, insulation, tele cover, ROCK.. Then snowshoe back to the house..
The snow around the hives will insulate them better than anything else that can be done. SO long as the TOP is insulated to prevent condensation, and they have the added insurance of fondant, sugar, candy board etc... they are good to go!
I would insure the top vent was open as well, but thats a matter of personal preference.. If the snow is that deep chances are the hive will be buried and the top vent will not matter.