Observations and photos?

Hi, I am due to finish my nvq2 next month (not long now!) and the nursery have asked me if I would like to do my NVQ3 there. (I think they may miss me if I leave) so i told them i would think about it. anyway, the question is, is it OK to carry on writing observations on every child that I see doing something that they normally do, or is it a good idea to follow the planning for that fortnight? i haven't asked anyone at the nursery and no-one has mentioned it to me? and the same with the photos? or do you think that they might feel as though they are getting overworked with them all?