I won't share details of Odie's spay because she had a hard recovery, which isn't the norm. I just wanted to add that I found a heating pad really useful. I put it under blankets in her bed and put it on low (only when I was around) to help keep her temperature up. She loved it, and curled up and went right to sleep.
The idea of a playpen is a really good one, especially when she's still recovering from the anesthetic. If you can find any pure pumpkin or yam, it might be a good idea to have some on hand in case she gets upset tummy from the drugs, which is common.
After Odie had a really good rest, I did wrap her up in a blanket and bring her up with me on the couch to cuddle but when I had to get up I would put her back in her playpen.