One note:
If you're descending down via Consultation Lake, that means going down the switchbacks.
So what are you doing with your camping gear? Taking it up to the summit with you or figuring on going back to Iceberg lake after returning near the Portal?
There is no easy way to get back to Iceberg Lake from Consultation Lake.
Taking full gear up the Mountaineer's Route will be challenging, especially if you haven't done similar climbs with full gear.