I don't think there's been a fire. I was there early June of this year and it was fine. We were expecting high water levels but nothing was higher than the top of my wheel (rim).
It's a fun trip for sure! The Peace River Off Road group was in there with the Grande Prairie Jeep Club. Might have to do it again next year.
If you have any specific questions, let me know. Bring a jerry can or two!