AutoCAD Civil 3D :: Best Practice For Layer Naming And Object Layers

I've used E- for Existing and P- for Proposed for my layers and/or style names.  For Object Layers, I've used OBJ- with modifiers and set the layers inside the styles to 0.  This works ok, and Civil 3D objects obviously stand out and are easily isolated thru layiso and such, BUT having styles set to 0 presents a problem when dumbing down a drawing to send to another firm.  The C3D Objects that are dumbed down are on layer 0 which isn't good.

We're generating a new template for 2013 and want to gear it towards the National Cad Standards on some level and do away with 0 as the style layer and actually have the style layers set to something other than 0.

My initial thoughts from a simplistic standpoint are:

V- for Survey and Existing features
C- for Proposed features

I understand there's many more designators.  We mainly do Civil and Utility work.I know V is a designator for Survey but can it cover and should it cover existing features too that aren't surveyed, for example if we receive mapping from someone and want to reassign some layer names? Is C- strictly for Proposed/Design work?

I'm reviewing a template we're working with someone on and they assigned the layers inside an Existing Surface Style to C-Topo-Majr and C-Topo-Minr.  They assigned the layers inside the Proposed Surface Style to C-Topo-Majr-N and C-Topo-Minr-N.  The only difference is the N for New, between the style layers.

Shouldn't the Existing Surface Style layers start with V-?Just trying to get some feedback on a simplistic approach to Layer naming and keeping with the National Cad Standards on some level.