This is a tough call.
If the adr time is shortly before the party begins, they are many reports that you are allowed to keep your adr but are escorted to the exit gates upon finishing your meal. You are not allowed to linger and shop, as when the park closes.
However, your adr isn't until "after" the party begins......this could pose a very big issue. They could deny your reservation without a party ticket.
Is there any way to change your CRT night?
What about going to the party?
You are taking a big risk with CRT being a CC hold. If they don't allow you to dine, you will be charged anyway as a no show. And it would be without you eating.
I would seriously not risk this.