Nice thought but I can just imagine the result here in the 'burbs of having a Guy Fawkes bonfire and fireworks !
Can't even do that July 4 !
Well, the way to do it would be to start out small. Invite a select group of friends whom you think would be receptive to such an event to meet you at a local city, county or State park that features a built-in firepit or barbecue. After you finish cooking the food on the barbecue, build up the fire as big as is manageable and then you pull out your (small) Guy Fawkes effigy and dangle him by a pole or just throw him in the fire. You can use this opportunity to tell those who don't know about Guy Fawkes and the history of Bonfire Night. You can tell of how you used to make BIG bonfires back home, and I'll just bet you that someone will say "hey, I have some property outside of town....how about if we do this in a BIG way next year?"
It might grow into a tradition....look at what happened with "Burning Man", and how big that event became.....and the difference here is that Guy Fawkes Day actually has some real and very significant history behind it.
Just a thought :-)