That same 95% might have less than a thousand homeless people total and theres just too much park acreage for the few who might loiter there to ever dominate a park. Its a non issue. People go to the park in places I lived that are large and small. By and large the few homeless people who congregate in parks very much don’t want to cause a big nuisance and a police visit and keep to themselves.

In my experience parks in suburban areas tend to be reserved for sports facilities (baseball, tennis, etc) and playgrounds. They’re not usually nice places to hang out.