I agree with Ali - have a chat with her and see what she thinks.
We always sent Charlotte to nursery with MEOS and ME wraps and never had a problem. I did this as I knew 2 parters were very reliable and I had enough so that they only had 1 type of nappy to know how to use. She had multiple carers and moved rooms and we never had any problems.
If she would prefer pockets then BGs or Happy Heinys or Blueberrys would be very easy for anyone to use - something with velcro. I would try to get enough of one type so as not to confuse her