If you made a list of the people involved in this and next to each name wrote what they ideally want and a tick or a cross if they normally get it, how many years since you got a tick ?
Eg. Ideally I would like a low cost Christmas where i dont have to decorate, but i get lots of lovely food, I would like to be waited on, give vouchers or money rather than shop for gifts, sleep in my own bed, do no work before during or cleaning up after, , spend it with lovely people, shall go on?
You get to have the same wishes if you want, I don't see why yours should be less important than anybody elses. You might have to give up a few points so that the workload is fairly shared and another if you like to give more thoughtful gifts? You might even want something different as a point in its own right.
Your parents currently completely dominate getting ticks on the list! so its only fair that there should be a bit of readjustment and this means they might have to give up having the celebration on actual Christmas day.
Even then Im really confident they would still get a lot more ticks for having things the way they like it than you would.
Then you add in your kids wishes and your husband's and you see how much your parents thumb is on the scale of fairness here.
Go see them in the quite days after boxing day. I don't see why you should feel any guilt about this at all.