I did a variation of your method last night by saturating my hair with conditioner (Natures Gate Asian Pear & Red Tea) and sealed with an oil/butter blend) and baggying it. My hair was so soft this morning! I ended up putting it back in a bun for the Summer Bun Challenge in 3c.
APL BSL MBL WL HL TBL | porous, fine/medium strands, medium density
Below: Typical PS bun