Mostly yes. A big part of the experiences are inside.
Yup. Just as the other guides stated it is completely possible to enjoy while it's raining.
Most of the exhibits are inside so yes
Even the bus tour will be ok in the rain. The bus drivers really put what they have in narrating the tour. So I'd say they would position the bus in rainy conditions to see best what they routinely point out. The main pavilion might have some walking that might be in the rain, but the themed buildings have their presentations inside.
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