The cake works well assembled the day before. The banana pudding and bananas were a big hit... I think they make the cake less dry and even the kids who normally don't eat cake enjoyed it.
The caramel sauce icing was a bit of trial and error... Rubby had a batch of caramel sauce that had crystallized into fudge that i was using. It worked well cause it gave a heavier texture but it had bits of caramel which got stuck in the piping nib. I just switched to a larger nib and the bits no longer got stuck.