3D Studio Max has a nice feature in Grouping there model and instead of getting rid of the groups, all you need is a button to make them invisable or make them visable. That way you can work in areas and not have them show up in the scene Editor. So just need a on/off button for each node group. Shouldn't be to hard to make, and then to get them back maybe a show all button to get them back? Works for me /winks.
DT