Bat watching on the riverwalk.

Anyone been to see the bats come out along the new Riverwalk extension? If so where do you park?

http://www.ksat.com/news/19663295/detail.html

(but really, if you want to see lots of them, Austin's Congress Ave bridge, or even better, Bracken Cave - but that one needs a member for access.)

But where to park?

I zoomed in on the map that was on the link. I see a big parking lot near the area, but cannot tell from the aerial view if it is open to the public. In the map, it looks pretty empty. I also did a google search, but no luck for me there. Sorry, i have run out of ideas.