I made a reservation for CRT for 4. Now I think I may need to change it to only 2, since I paid upfront when I made the ADR, will I still get charged for this ressie's even if I have to cancel it?
Once you know for certain, call and change it to the correct number of people so you can get a refund for the ones who won't be coming. You have until 48 hours before your reservation to make the change. If you don't, you will be charged for all 4.