Yes to both.
I probably don't mention bus bars enough - I guess I just assume it. Having a dozen ring terminals on a single stud is just an awful thing - in my opinion. A good bus bar is much better. I've used a variety of different styles but my current favorite are ones like this
On the positive side (12VDC), I've kind of standardized on this style
from Blue Sea. Not saying it is the best in all situations, just one I like.
I'm dealing with a 45' coach. Instead of running every power/ground wire from near the battery (bus/fuse panels), I have run a couple of fused, larger wires to bus/fuse panels to a couple different places and then branch off more circuits from there (another bus bar and fuse panel).
For anyone doing a conversion, a decent set of electrical tools is a worthwhile investment. That would include at least a ratcheting crimper for smaller wires, a crimper for large/battery cable (I use the hydraulic type but several styles exist), and wire stripper.
Maybe another point worth mentioning... I'm also using the Molex 1625 series
connectors which require another crimper. I really like these connectors as they are available in a variety of wire counts and are pretty small and tidy. When I build something, I spend a bit of time thinking about how I am going to maintain it and that includes taking it apart without cutting wires. This type of connector makes that easy to do.