Preheat oven to 400 degrees.
Rub the outside of the potatoes with canola oil. Place the potatoes in a baking sheet and bake for 1 hour. Remove the potatoes from the oven and reduce the oven's heat to 300 degrees.
Combine the butter, sour cream, 3/4 of the bacon, milk, seasoned salt, and pepper in a large bowl.
While the potatoes are still warm, grip them with clean kitchen towel and slice in half lengthwise. Using a spoon, hollow out the potatoes. Repeat until all the potatoes have been hollowed out. Place the potato shells on a large baking sheet.
Add the potatoes to the bowl with the sour cream mixture and combine using a potato masher. Stir in half of the cheddar cheese and 3/4 of the green onions to the mixture.
Fill each potato with the mashed potato mixture, leaving a little room for the reserved cheddar cheese. Top with the shredded cheddar.
Bake for about 15 minutes, until the cheese is melted and the potatoes are hot. Sprinkle with the reserved bacon and green onions.