I live in O'Fallon Missouri not far away , till I retired at the end of 2017 I used to hunt the big sports complex in your city . I would run out and hit it during my lunch hour. Two wood chip play grounds , to concession stand and about 11 ball fields as well as tennis court. No issue with hunting it from the employees have found lots of clad there , good place to test a new detector. With this being ball season should be lots of fresh drops in the wood mulch. Haven't been up there this year yet , many closer places . Another place you might look into is Frontier park in St. Charles Missouri found a number of coins there , with the number of events held there all ways new stuff being dropped. Was flooder recently I normally park by the Lewis and Clark Boat house and walk across.