Rub the russet potatoes with vegetable oil and sprinkle with salt. Prick them with a fork to allow steam to escape during baking.
Place the potatoes on a wire rack and bake for about 50-60 minutes, or until they are tender when pierced with a fork. Note: You can do this step the day before. Just let them cool and store in the fridge until ready to serve.
Once the potatoes are cool enough to handle, cut them in half lengthwise. Scoop out the flesh, leaving about a 1/4-inch layer of potato on the skins. You can save the potato flesh for mashed potatoes or just enjoy on their own.
Brush the potato skins with a little more oil and season with salt and pepper. Place them back in the oven for an additional 10-15 minutes, or until they are crisp and golden.
Remove the potato skins from the oven and fill each with shredded cheddar cheese and crumbled bacon.
Return the loaded potato skins to the oven and bake for another 5-7 minutes, or until the cheese is melted and bubbly.
Once out of the oven, top each potato skin with a dollop of sour cream and a sprinkle of chopped green onions.