I visited both outlet locations last month and there were free parking spots at both. But a portion of the parking spaces have been converted to valet, paid, or MyPark (an app you can use to reserve a spot in advance for a couple dollars), so it can be hard to find a free spot later in the day. I was at the outlets on a weekday between 10am-11:30am and it was easy to find a free spot. By the time I left I could see it was filling up quickly.
MyPark didn't seem like a bad option if you need to go later in the day. I think it was $3.