It will vary on a few factors: when you want to go, what restaurants you want to eat at, and how many are in your party. If you are flexible on where you eat and when then yes there will be plenty of places to eat. But if you have your heart set on a specific restaurant then you'll want to book at the 180 day mark. For example, our upcoming trip is over Christmas so Christmas Eve and Christmas Day dining reservations were incredibly important to us, so we were online at our 180+10 in order to guarantee that we got the reservations that we wanted.