Grease the bottom of your slow cooker with butter or non-stick cooking spray. Cut each of the regular cinnamon rolls into quarters and set aside the icing packets.
In a large mixing bowl, whisk together eggs, heavy cream, cinnamon, nutmeg, vanilla, salt, and honey to create the egg mixture.
Add an even layer of cinnamon roll pieces to the bottom of the crockpot.
Pour about ⅓ of the custard mixture over the rolls and sprinkle bacon crumbles. Repeat layers until everything is used.
In a small mixing bowl, combine brown sugar and cinnamon. Sprinkle over the top of the casserole. Place a clean towel between the lid and crock pot to absorb moisture. Cover tightly. Cook on low setting for 2 hours.
After the 2-hour mark, check edges. Continue cooking for another 45 minutes to 1 hour, until set and golden brown.
Mix frosting ingredients with a hand mixer until smooth. Drizzle over the top of the cinnamon rolls and serve warm.