Most of my time spent at Freedom Park is from 5:30am - 6:30am at Ultimate Crossfit Bootcamp. This is my favorite Charlotte Park. It is large and there is plenty of open space to find a peaceful area to relax, read a book or just people watch. Taking the dogs here is fun as well - great social interaction for them too. I will go here on a Saturday every now and then to run through the park when there is daylight.
I have even seen people fish in the lake - however, I can't vouch for their success.
I will go back, over and over.