I have 2 friends that went through on Lesser Slave, 2 of the guys lost their snow cat in 15 feet while taking their shack out, the only thing that saved their lives was their shack didn't go down, otherwise they would have died of hypothermia.
I hate to say it but it's a bit early to be driving anything on lakes anywhere. It's awfully sad when the day starts out as something fun and a guy never gets to go home.