Spray the crockpot generously with cooking spray.
Put half of the cinnamon roll pieces in a single layer on the bottom of the crockpot.
Whisk together the eggs, heavy whipping cream, maple syrup, vanilla, and cinnamon. Pour this over the cinnamon roll layer. Spread the remaining cinnamon roll pieces over the top. Dollop one packet of icing over the cinnamon rolls.
Cook on low for 2 1/2 to 3 hours or until the sides are golden and the rolls are set.
Drizzle with remaining icing packet.