First and foremost: Get a copy of the NOTAM. Link. Read the entire thing, but especially understand page 19. 1). Yes your Avid is perfectly welcome at the Ultralight Field. 2). Yes you are perfectly welcome to camp under your wing in the Ultralight area. 3). You are supposed to be there. What is "the official guidance document"?
This video shows the pattern to land to the Northwest: Link
In flight with this system, on a long decent for example, the motor could slow from the point of engagement causing the prop to windmill. Correct? Has this system been flown yet? What is that behavior like?
I did the 16 hour course when I had my previous Kitfox (it was E-LSA). I took it at OSH during the winter.
The course is VERY remedial. There were a few things that I took away, making it not a total waste, but, be prepared to be bored out of your mind most of the time. Like Joey said, most of the information you can readily find on the web or you already know. My instructor was a very knowledgeable IA, but had no clue about 2-strokes or Rotax engines in general and spent some time bad mouthing them until he was challenged. This was back in 2009 or 2010.