Yes, thank you for asking! Please check out the accessibility page on our website for more information, and to download a wheelchair route map: https://sbnature.org/visit/accessibility/
I believe that it is possible to use a wheelchair, but you should have an electric one or have somebody pushing OR have forearms like Popeye. I don't personally use a wheelchair, but as someone who has an assistive device, I notice things that others usually don't.
Yes, the museum has every provision for wheelchairs
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