I have both an Eskimo pop-up shelter and a Frabil one-person flip-over shelter. I think the pop-up shelter is a lot more stable in the wind if you tie it down to four ice screws with boat straps or ropes attached to the center of each hub, and you throw snow on the flaps around the base of the shelter to keep wind from getting under it. I don't add ice screws through the grommets in the corners unless it's blowing so hard that I really shouldn't be out on the lake. And I never rely only on ice screws installed through the grommets in the corners. The flip-over shelter is pretty high and narrow, and thus is harder to stabilize in high wind. If you screw it down with its back to the wind, you just know that the wind is going to shift and start blowing on the side of the shelter. I use the pop-up shelter when I'm going to set up in one place and stay there. I use the flip-over shelter when I'm going to move from place to place throughout the day. The flip-over shelter is wider than a typical Otter-style sled, and can be a lot of work to haul around if there is much snow on the ice. An advantage of the flip-over shelter is that I can set it up with its back to the wind and the tent sticking up at 90 degrees as a windbreak, so I can enjoy the scenery with protection from the wind.
