I just purchased a used Polarbird 4T in good shape. I know they have stopped selling in the US but see others purchased them on this site a few years ago. Anyone have tips or other recommendations for the bag? I feel like the straps may be a pain in the cold but I suppose so are the zippers on other pop ups. Also I remember reading that people were adding fishing holes to the insulated floor? Does anyone have recommendations on doing so? Looking forward to using it as it is my first pop up and insulated shelter.