Thanks so much for everyone's help so far.
Our tickets are booked, and we have a place to stay in Calgary, and a backup RSVP near the Ice Fields.
I think the general plan is that Saturday-Tuesday we will spend in nature, then travel back to Calgary for Wednesday-Saturday.
The real question at this point is area is to stay from Saturday-Tuesday. Ideally, we would stay in one location all four days since packing, etc, with the kids becomes a bit tough.