I can understand the wanting to bring her home and to sleep w/ you. I would follow vet's orders. If her 3 days rehab is before surgery,I would do as they ask,pets can get very stressed going to the vet,imagine going 3 days in a row,poor thing would be freaking out. If she's there a couple days before,she will settle into a ruitine and be less nervous before surgery.
I understand the "no visits" the day before,our Amy used to get so scared at vet visits,he'd ask us to leave the room and she'd settle down a bit. If she saw us,she'd cry and fight more. It was more traumatic to have us in the room because she wanted us,so we'd step out for a couple minites,he'd finish the exam and we'd go back in. It was traumatic for us too,we'd feel bad,just leaving her for a couple minutes....
I would follow vet's orders,as much as it hurts to do so,missing her so much...I would crate her next to you for sleeping,I wouldn't want to take the chance to bump or even roll on her in the night and hurt her. I know it's hard. But better to have her near the bed than in it after surgery.
It'll be over before you know it and she'll be so much happier and healthier.
Hugs to your baby girl from the dust mop gang and myself.