I say put her in a big bed, and let her get herself up in the night and bring herself in to you! Works in this house! I found after a couple of weeks DS slept through all the newborn goings on anyway if he was in our bed, and I say just do whatever gets everyone some sleep

He now only occasionally comes in during the night, most nights he sleeps through and then comes in early in the morning. But I've always loved that we put him in a bed so I didn't have to go and get him LOL. This way when putting him to bed I've always been able to tell him to have a lovely sleep in his own big bed, but if he wakes up, he can come and find mummy & daddy and climb into our bed. I too, often wake to him in our bed and wonder when he came in!

Do you have space in your room for her bed? or a mattress for her? Or will her cot fit in your room? That might help the transition a bit?