my DD just started nursery today and I had been getting a stash of pockets for her to wear (mainly BG V3 but also some Blueberrys and WNSS). Turns out they already have one little boy there who is in prefolds and wraps, so they are happy to use anything and are even happy to use fitteds and wool (which is what we use 90% of the time)
Just for ease and to avoid stuff getting damaged and stained etc though I think we'll either go with fitteds and interlock trousers, or Blueberry pockets - these seem to last DD really well and are slim enough to go under most of her clothes. Tots Easyfit didn't work for us at all and I ended up selling them all on - DD leaked everytime in them
I have also bought some Frugi cut4cloth branded jeans and trousers, they are much roomier through the bum so will go over fitteds and wool as well as pockets - they will be our nursery clothes.
I think BG are also a great option for nursery as they are velcro and go on just like a disposable - I just don't really like applix nappies so I'm going to try and move over to all poppers shortly (I think V4 now has a popper option? haven't tried those yet as bought mine last year).
I would say go with what works for you - you may well find the nursery staff are more accomodating than you expect - mine were really interested to see DDs nappies this morning - maybe I'll convert a few more people