1) What would absorb more - a Cotton Babies microfibre insert or a Baby Beehinds Bamboo booster?I haven't compared, so cant help on that one, sorry!
2) Where can I find a pattern for a Wool soaker?ozclothnappies.org has soaker pattern links- lots of people have used them with success. You might need to tweak a bit to get the perfect fit for your baby but I am sure you woud have some fun in the process
3) Do you ever use wool covers during the day?we do sometimes! They just look so adorable. Wool does make a very effective cover and using them during the day would work wonderfully.
4) How do you hang your fitted nappies to dry?I drape ours over a clothes horse most of the time, but when I line dry, I hang them sideways...by that I mean horizontally over the line (like you would a bedsheet) rather than vertically. Hanging them sideways means less unecessary stretching of elastic.
5) If you have a hemp or bamboo booster does how you fold it affect its absorbancy?Our bab isnt as heavy a wetter as he used to be, but when he was peeing more, we would fold the booster so that there were multiple layers in the wetzone. So for example with the bamboo fold up, one side would be folded in 1/3 of the way, and then I'd flip it around so the folded edge was facing me, and then fold in thirds from the other direction. That would mean multiple layers at the front right where my boyo needs it

Hope that helps!