I assume you are talking about Big Walnut creek next to the park. I grew up by Big Walnut just down stream. One of the best kept secrets around. Smallmouth bass, Rockbass, Carp, Catfish, you name it. I generally take my canoe. There is a put in a little further north on Noe-Bixby. The creek is big enough to have some really nice holes that hold plenty of fish. I'll make several trips there a year and lots of those are to catch Carp. What a blast!
There is some nice water north of 270, which is just north of the put in.
There is a pond across Refugee Rd. but I don't know who owns that although I seen lots of people fishing there over the years.
Give it a shot, you won't be disappointed. Give me a shout and I'll show you some of those honeyholes.