Charlie,
When I'm working for myself I create considerably less detail in my plans than I do when creating them for other folks. As I'm sure you've discovered, by the time you complete the detailed sketchUp model, you already know almost everything you need to go to the shop.
I do some drawing work for a cabinetmaker in another state. We have an agreed upon "vocabulary" so I don't have to detail certain things. For example dados and rabbets in 3/4" sheet goods are almost always 1/4" deep. So I don't have to take the time to include that dimension in drawings. Face frame elements are nearly always the same width and things like that. Before I started drawing for him I asked for a list of his standard things. It seems to work out quite well.
You might be able to do a similar sort of thing, too.
As far as hardware is concerned, I don't draw it in for myself and only add it for others if there's some reason. The knife hinges in the cabinet drawing were included because the mortises are kind of unique. It was easier to explain the mortise with the hinge there. If it were a barrel hinge for a jewelry box lid, I would probably only indicate where the holes need to be drill but I wouldn't draw the hinge.
I expect you could find some hardware in the 3D Warehouse but most of the stuff I've found there has been either way over detailed, not drawn to the proper size or otherwise requires so much cleanup and repair that I don't bother. It's faster for me to draw the stuff from scratch.