Steve
In the Santa Claus parade, the displays are called floats, they are the oohs and aahs built on the trailer. Listen to the announcers describing the "floats", they are talking about what you see, not the deck upon which they are built. Maybe the Canadian colloquialism refers to the deck, but that is why we got confused.
I haven't seen anything that will tow an AWD that cannot be modified for towing 4 down. The double axle thing-a-ma-bob that you mentioned probably wouldn't hold up for long distance towing on highway speeds. IMHO, if you go with an open trailer, the best on the market is the Trailex (www.trailex.com). It is more expensive but it is all aluminum and one person can move it around and set up. If you call, ask for Carl Carbon and say that I said hello.