I looked at Scott's other post and it seems that I will "flatten out the structure a bit more and essentially collapse the pole feature class and sign table in to a single Sign feature class". The join in ArcMap is somewhat of a deterent from me doing it the currently established LGIM way. I'll just create this feature class by looking at the type of feature class and the attributes from both tables and creating the feature class from scratch?
I'll look at both options for the cross walks, both are good suggestions. I think I'll need to consider ways to cartographically represent the data on maps too.
Finally, is there a way to find out some of this information on my own or is it best to just keep posting questions in this forum and get advice from others (or Scott)? I guess the more I work with the LGIM (v 10.1), the more familar I will become with it over time?