If you rub oil on the potatoes that will be fine. Don’t forget to pierce each potato in several places too, to allow for steam to escape. And you’re correct, we definitely recommend NO foil (wrapping afterward is fine). As for double-layering the potatoes in the oven – I’m assuming you’re trying to save time – but that’s not a good idea. Place similarly-sized potatoes on a single layer. This will allow for good air circulation in the oven and even cooking. Even if you have to cook a second or third batch it’s better than uneven or inconsistent cooking results. Here’s a link to more information and thank you for serving fresh Idaho potatoes as part of the celebration!
https://idahopotato.com/dr-potato/how-do-you-bake-large-quantities-of-baked-potatoes
