9lb turkey, no brine, herbed butter under skin. Temp? Do you recommend 1st 30 min, upside down?

You've got some options! https://food52.com/blog/18372-the-essential-numbers-a-guide-to-times-and-temps-for-cooking-your-bird

And here's another source: If the turkey isn't stuffed, Foodsafety.gov recommends setting your oven to 325º F and cooking it for 2 3/4 to 3 hours (3 to 3 1/2 hours if stuffed).