Hi Mel, I haven't had personal experiance of this but have heard of one that uses Easy Peasy Bumbles. We chatted about this the other day and I did actually test mine in the day for you. He was in it over 4 hours with travel and nap and it was fine, although he is not wetting as much as he did before he is normally quite a heavy wetter. I'm a bit funny about chunkiness on a newborn but htere would be no reason you couldn't have Easy Peasy Bimbles for the little babies and bumbles thereafter (and even bumpers for toddlers) that way they are all from the same company iyswim! You could even get them made colour coded to make it easy for staff ie Bimbles white, bumbles blue and bumpers yellow for example.
If I knew of a nursery that used cloth I'd be there in a jiffy!!
sorry haven't really answeredd your questions but hope I've helped a bit anyway!!