I did the ride from Toronto to Thunder Bay. I carried enough food for 2 days but didnt' need it. There are towns every 40-60km. So bring something to snack on ..peanut butter and bread is always good. You should be able to find a town for dinner.
One post was right , the views are great but at times you are sharing the road with big trucks and little shoulder. Also do the ride from west to east. We went east to west and faced at least a 20km head wind everyday ..all day!!. We were very jealous when ever we saw other riders enjoying themselves going the other way.
Enjoy it.