With team sports scrapped for the time being, the graceful expanse of Bluffs Park has been colonized by the rest of us, ambling families, brisk walkers, people with dogs and toddlers and elders in wheelchairs, runners and racers and young sidewalk chalk artists, t'ai chi-ers and nappers, all enjoying the Pacific breeze. And now, a new addition, the welcome-to-my-castle pandemic picnic.