Many people think that it is crazy to make dining reservations at 180 days out from your arrival. Way back I thought that too. I have learned if I want the best locations and the best times you need to book early.
Use this link to calculate your 180 day mark: 180 mark
Also, use this link to decide what would be the best food choices for your travel party: Disney Menus
Both are helpful tools for your Disney vacation. It is important to know as much as you can before you go to keep the stress down and the fun up.