Sisters sharing a room

Our girls are going to share a room very shortly. We have an almost two year old and a three month old. The 3 month old is in a pack and play and the 2 year old sleeps in a toddler bed. They will be great sharing a room, but we do have one concern. Our 2 year old loves to help her sister by bringing her blankets. Lots of blankets. I’m worried that she’ll do it in the middle of the night and cover her face with them. Anyone have any idea to prevent this? Most likely I think we’ll have to just set up some kind of barricade around the pack and play, but any ideas are welcome :)