Michigan State Parks Dealing with Worker Shortage, Pick Up After Yourself As we gear up for the Memorial Day weekend, the Michigan Department of Natural Resources is trying to prepare for the surge of tourism and activity at state parks. Normally, it wouldn't be an issue or the topic of discussion but this year they're asking that you pick up after yourself while spending time at Michigan's parks. According to ABC 12, a shortage of short-term and seasonal workers at over 100 sites in the Michigan State Parks system, including Seven Lakes State Park in Holly, could affect the experience for some visitors.