I didn't notice any outside seating, but I did notice quite a few older folks sitting on the benches in the designated areas. I would definitely call first.
Call to find out
Yes, you can. They specifically say you can bring strollers, scooters, walkers, wheelchairs and other mobility devices. They also have small number of free wheelchairs to borrow. Here are the prohibited items: tripods; monopods; selfie sticks; guns; 3D weapons; knives; pen knives; pets; food and drinks; scissors; aerosol cans, including pepper spray and mace; tools; smoking; placards, signs or banners. They do not have a coat check and encourage people to travel light...but they do have a limited number of lockers.
They have lots of seating, but I would call and find out.
I believed that if is a medical equipment, like the walkers with the adjustable seat it is fine, or rent a wheelchair
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