Ah crown. Said it before, may say it again; it's where the butcher has removed the best bits to sell separately, and flogged you what was left over. I have a sister who insists on getting it, presumably to mar Xmas dinner. She won't listen; I've pointed out one of the best bits is having a drumstick in hand to devour. Still I can't see everyone coming 150 miles to my place for Xmas so it has to be me travelling to one of my siblings or their partners if we are all to get together.
I'm unsure what the issue you have is regarding the crown. There are only a small number of variations in how to cook a bird unless you intend to do something different with spices & herbs. It's must be much the same as a whole bird you will have done previously. You know, prepare & season & grease (with butter probably - forget the diet), heat the oven, bung it in, baste occasionally, take it out to rest when the juices run clear.
Oh before I forget, best of luck with ten of them ! I hope you have a large oven (or two). They should demolish it before you get sick of it, but otherwise there are stews, goulashes, curries, even sandwiches, etc. etc. etc. you can use the leftovers with. I tend not to see it as the same if the dish differs, surely I'm not unusual in not worrying that the meat was the same as yesterday is I'm tucking into a casserole rather than slices with veg & spud ?