I didn't read all of this but a couple of reports I saw jumped out at me. One seemed to say the crown was 7 -9 metres BUT maybe it really referred to the debris pile depth.
The more interesting one was about a 20 year old guy maybe local to revie and sounds like he's big into the sledding. He decided not to go out because he felt it was too dangerous due to recent activity. The 20 year old tried to talk his Mother out of going but she went anyway. She was one who was unaccounted for at first but has been found fine now it seems.
The dead guys are from Lacombe and Strathmore and as mentioned run an oil supply company. These places are pure prairie and are typical homes for a lot of the Revie weekend sledding crowd. I'm far from the slowest guy who drives highway 1 and when I get passed 8 out of 10 times it's a big diesel truck pulling 2 - 4 sleds. A lot of these guys have a risk mentality that goes way beyond safe choices.
Just last year 7died? out of a group of 14? and yet 200 can gather in a place like that and still ignore serious avalanche warnings. That's 200 people ignoring most common sense. That says an awful lot about the mindset of a large portion of these enthusiasts.