I used to co-sleep with my two year old, and baby twins…two double futons put together and only a mini blanket for the toddler. The twins in zip up sleep sacks, (me sleeping between the toddler and the twins) so it was quite safe, and saved me from having to going from bed to bed all night when they woke up. But my whole english family were horrified at the idea, haha.
They twins are seven now, and have just stopped coming to my bed, which im glad for as they take up too much space! Whatever helps everyone get proper sleep goes, imo!