Are there bathrooms available along the trail?

Only at the halfway point.

Yes. Well keep bathrooms.

Yes they have one set in main building then past the fountains and i forger which garden is another set.

Yes

Yes there are restrooms in a small building central to the trails just before the pond. Very clean & conveniently located midway from the entrance building which also has bathrooms.

There are restrooms in the Children's Garden and towards the back of the birding trail.