Congrats on the new purchase. As Far as drilling the holes on my Clam 2000 I keep one of the spreader poles set to the distance between the two openings. I just lay the pole on the ice, Drill a hole at each end and slide the shelter over. As Far as keeping the sheleter in place I use some ice anchors. The best tool for puting these in is a cheap cordless drill. I will usually put three on the down wind side, one in back and one on each side. I don't tie the shelter to them but place the anchors right against the edge. Sliding the shelters is easy enough, a little harded in snow but still managable.