You are doing all the right things and are going to be so much more prepared, knowledge is gold in this situation.

We used a prem dummy, which was a cherry shape, but a very small one, DD could never hold on to the cherry dummy, we used to hold it and try to encourage her to suck, we ended up using a Nuk dummy when she was 9 weeks old. Maybe have access to a couple of shapes to see if she is able to suck on one better than another. I don't know if there is one that is closer to the breast....

Also make sure that you have signage for her isolette or cot to say that she is only to have a dummy when being NGT fed, that will help in avoiding confusion and someone just popping it in her mouth if she seems a little unsettled. As the sucking takes a lot of effort and best to save the effort for feeding times

The medi hotel will help in establishing the BF'ing, at first if you can BF for those overnight feeds, even just going down for her OB's etc will make a difference, she will associate your smell with feeding times as well. Also getting sleep inbetween these times is very important for your supply, so don't feel bad if you get up to express and don't make it down to one of the feeds in the middle of the night.

Take care, will be thinking of you
xxoo