Hi Frank,
Yes, the Maroon descendants hold a secret ceremony in "old town" which is down the hill deeper into the bush where they camped during the war before returning to the Kindah "One Family" tree to bless the spirits and to cleanse the people by spitting rum on them before marching through the town often with up to a few thousand revelers from the outside world.
It is quite a moving experience. Here is a link showing some of that.
Peace and Guidance