So you want to hold a family photo session in Dumbo. You and the thousands of other families, couples, birthday kids, fashionistas, bloggers, and deep-pocketed commercial producers. It’s popular. That goes unsaid. But Dumbo has so much to offer that’s also off the beaten path. If you’re willing to walk down a completely unpopulated street, you might find some surprises. You know this guy? He’s got a mural in Dumbo now, but it’s not at the waterfront (wink).