Danj, not sure why the indecision. Draw the models and then you can GROUP them together. E.g. each mini tree on it's own, then make a group with the mini tree and it's star, and then a group of all the mini trees, or every other mini tree etc.
Go wild with it, as suggested above, make some duplicate different shaped models so you can drop different effects on the other non visually representative models.
See the post the other day from a fellow with concentric circles and all the custom models he drew up of it.