Can I launch a model rocket here?

I'm pretty sure you can as long you can assure it lands in the perimeter of airspace assigned to aeromodeling .

I'm gonna go with NO!

I saw folks with model planes, but it's worth calling them directly

Sure. They fly drones and model planes there all the time

I'm pretty sure you can, good question!!

Check with the park officials to make sure. But you can fly model planes and drones.