We also had to stay at Eliz Head because the Foot was booked. The good news is that day 2 in the Belly is mostly flat and good for the legs. We stayed at Glenns L head our 2nd night. Stoney is very nice if you got a site there. Also a bit of a hike up.
Sue Lake overlook.
A good little jaunt before dinner and very cool to explore. Amazing above treeline stuff from Waterton Valley all through to granite.