Welcome to Kifaru!
The Sawtooth is a great structure, and I am sure that you will enjoy it as much as I do mine!! If you are looking at "deep" snow, I don't think the dura-pegs will work very well for you. Either a snow stake, a picket, or a SST would be a better choice, IMO. With frozen tundra, they should work decent, as long as you don't hit any rocks. Remember to tie on some twine to help pull them out. I personally have switched out my dura-pegs for 6" & 9" ground hogs, as they seem to slice through roots better. I haven't tried them in frozen tundra yet, but I would guess that they would work just as well.
What part of AK do you hail from?
Make it your ambition to lead a quiet life, to mind your own business and to work with your hands, just as we told you, so that your daily life may win the respect of outsiders and so that you will not be dependent on anybody.