I miss my old 30 mile RT commute. After a few months of that, I would pack two backpacks, leaving mandatory items for work in the second pack. I would ride to work on Mondays with a full pack of clothing and weekly needs, then turn around and go home to get pack #2. It was a great way to mix up the commute doldrums. Now, I'm on a 16 mile RT commute, where it's dark when I leave for work, and dark when I get home. Once Spring hits, I'll try the double again.