Ours sleep with us now. When they were babies they were crated or in an xpen. Once they were able to hold it through the night we put them into bed with us. I would try an xpen and put her in it at night before bed with a bed and a pad. Two of mine go outside and I used a crate in thier training and my little guy used the xpen and uses pads, they are all very well trained and have not peed in my bed.
I have used bells before but there was no way once I got into bed that I would be going outside, but that is awesome too!
If you are wanting her to be pad trained I would do a xpen with a bed and a pad, they dont want to sleep in their pee and at night make sure its a fresh pad then you know how often she is going through the night. Good luck!