Most of our trips are unplanned. A lot of time we will go before Howard has to work, so we'll just mess around in the afternoon, then he'll leave and clock in, and we'll spend a couple more hours there, and generally stop by and say Hi on our way home. When we only had 1 car and our daughter was small my daughter and I would stay in DL/DCA while he worked. So we'd be wandering around most weekends. It was tough the nights he worked till 2 am, but since she just slept in the stroller it wasn't bad.
Unfortunately since they've got him working so much it's hard to do with all these 8 hour or less turn arounds, he's so sleep deprived walking around DL is not high on his list at the moment.