MY DS hated his cot with a passion. I co-slept with him in the spare bed for a while.....till he was old enough, then I took the cot bars off (ikea cot) and he was in a toddler bed. He started sleeping once the bars were gone! Maybe it means he doesn't want to be incarcerated!

At times it would be too early for me to be in bed with him, but he wouldn't re-settle in his cot, so I'd put him in the spare bed, surrounded by pillows, then I'd go to sleep in there with him later once I was ready for bed.

This info probably isn't really advice as such, but I could relate, so thought I'd add my two bobs worth! Just do what you feel is right for you. If you feel your DD gets more sleep in a bed, then maybe get a couple of bed rail thingy's for the side of your bed and put them up while she's in there alone. If you know she's going to sleep like a log and not try and climb out.

Good luck