I don't think this will be that big of a deal. By "maintaining" and having the parks "open" all they really mean is that they get the grass cut every once in a while with zero other maintenance on equipment/structures/litter blah blah blah. Most parks in my area are maintained by the local residents. With the exception of large scale lawn mowing equipment I don't foresee anything different then things are now. They certainly won't be able to fence off parks if they don't have money. So keep calm and carry on.