Are there alligator and snake dangers there

I go with my wife and two young kids all the time. I've never worried about coming into contact with them.

I walk my dog there 3-4 miles everyday, just keep to the trails

Snakes if you (or your pet) wanders off main paths.

No

There are other creatures but I never heard of any alligators.

The walkways are kept clear of debris, but there is always the possibility of a snake sunning itself. Walking off the boardwalks and main paths can be problematic, especially over Summer.

Snakes