There was a documentary on, I think, Discovery Channel a year or so ago about a guy attempting just this. From what I remember from this, Transport Canada did not give him a permit to do so for a variety of (very good) reasons. He then attempted to do this illegally but (strangely enough) he never flight tested his ULM with the alternative (huge) fuel tank filled with fuel, so when, on his first attempt at 5am, with a full fuel tank, he could not get his contraption off the ground, he abandoned the whole attempt. The documentary went straight into the payoff after that, so I don't think he ever succeeded.
If you're serious about this, I suggest you contact Transport Canada for a list of their requirements. After all, they are the ones that are supposed to come and rescue you if things go wrong.