We don't have a whole lot of how-to stuff up on our blog/site at this point (more essays and trip reports), but my family does similar things. Just got back from a month-long arctic trek with our 19 month old and at 5-6 months pregnant. http://www.groundtruthtrekking.org/blog/
With a packraft, and 9 days food, and being photo geeks, the final number doesn't end up being ultralight, but the lightness of the actual gear is very important!
I'll put this comment on your blog as well.