There are a few small Mopar enclaves. There is a group up by 14 mile road. But it is a club, i believe the North Oakland Mopar Club?

Otherwise you just gotta either find someone or find a spot. I usually try to stay near the heart around 13 Mile. There is a large park there and fills with cars.

Here's a few thousand images from Dream Cruise over the past few years. It is usually the days leading up and through the Cruise.