There were kids there when DH & I went in May. Your wait will vary, depending on time of day (we were there late afternoon and there were only a couple of empty tables). I don't recall there being anything larger than a 4 top, so you may have to split up.
We have always had no wait when we went but we are only a party of 2. Like stated earlier I do not believe there are tables that are larger than 4 so you will need two seating areas, and just be forewarned most are high top seats and tall chairs, not sure how old your children are. Definitely will depend on where you are seated and winds, but we had one of the best times of a recent trip there sitting under a huge umbrella in a down pour with drinks and appetizers.