Cumminalong; Your rig is far too big to fit in the Wilcox creek campground located just south of the icefields BUT, there is an overflow camping area beside the icefields interpretive centre/hotel. If you don't mind dry camping (no water or sewer or power but there are a couple of outhouses) it is worth staying there one night. The views are stupendous and the interpretive centre worth a good visit. It is usually cold and breezy at night and literally is a parking lot so be prepared for that.
There are no other campgrounds nearby which would take your unit. Wilcox sites are too small and the icefields campground is for tents and small vans/campers only, no trailers.