DL- I really love the Fowler's Harbor area (behind Harbor Galley), but there's another great spot near the Mark Twain boarding area just after the snack kiosk that sells beverages, Turkey Legs, corn, etc.-right next door is a wooden "shipping area" (so this would be across from BTMRR fast pass distribution) and there are a tables and chairs. There's also a churro cart across from the entrance to the Golden Horseshoe (if memory serves correctly), so near enough that your churro would still be warm by the time you walked to the seating area. I love both of these somewhat out of the way spots next to the river.
CA-For some reason we never get churros in DCA. But my favorite spot in the entire park is the pathway near GRR, I think it used to be a smoking area, so if I had a churro in hand that's where I'd want to go to enjoy it.