You don't need a resort reservation to book dining reservations because you're within the 180 day window. You can go to the dining reservation page and try booking some character meals online now. You'll be able to see what is currently available.
Character meal reservations will require a credit card hold. They won't charge your card unless you fail to cancel the res and don't show up at the restaurant so if you decide not to go, be sure and cancel within the allowable timeframe.