Preheat oven to 320 degrees F (160 degrees C).

Loosen skin over turkey breast and thighs with your fingers; insert 3 pats of butter under the skin over the breast and 1 pat under the skin of each thigh. Poke 10 holes into the turkey meat over the breast and thighs; press minced garlic into the holes. Loosely pack poultry seasoning herbs into the turkey cavity. Sprinkle the skin of the bird with garlic salt, seasoned salt, black pepper, and onion salt.

Wrap turkey with slices of bacon, covering as much of the bird as possible. Place turkey into a roasting pan. Melt 1/2 cup butter in a small saucepan and brush butter over the whole turkey including bacon slices. Cover turkey with a tent of aluminum foil.

Roast the turkey in the preheated oven for 3 1/2 hours, basting with 1/2 cup melted butter every 30 minutes. Remove aluminum tent, baste turkey with pan drippings, and continue roasting until skin is browned and an instant-read meat thermometer inserted into the thickest part of a thigh, not touching bone, reads at least 165 degrees F (75 degrees C), 30 to 45 more minutes.