AutoCAD Civil 3D :: Soils And Land Type Organization

When I work on a site I need to identify several different situations and organizing those situations is getting hard, how do you do it?

The land usually has multiple soil types, a max of 4 types A, B, C, D

I also need to track the impervious, grass and tree areas going to an unknown number of outfalls

The impervious area can be broken down into structures, roadway, parking lots, sidewalks and other

Also you need to have this information for your existing conditions and your impervious conditions.

Usually I just delineate everything and hatch them with a layer like C-IMPV-A for proposed impervious soil type A

I have also tried creating parcels to represent the areas delineated, but when you get a couple hundred parcels it gets confusing.