I originally had it on my package when I booked, but as I got to the 44 day mark I realized I couldn't pay the balance, so I dropped the dining plan. It was a $50 fee I believe. If you do it greater than 45 days out, you don't get charged. I just added it back on last week, and did not get charged anything to add it back on, but you do have to pay it at the time if you have less than 45 days till your trip. And no, I don't think it cancels your dining reservations.