I’m in the Northwest Suburbs and we still go to the Shedd 1-2 times per year. When my son was younger they had “Asleep with the fishes” and you could spend the night at the aquarium. They featured animal encounters, activities like scavenger hunts, late-night aquarium exploration, and even a Caribbean Reef feeding dive before sleeping near exhibits like sharks or whales. It was only for minions up to 12, we had a lot of great nights, my back hated it but it was a great time.