Thanks for the great reply. I am pretty familiar with basic electrical work and have been doing a lot of reading on DCC. I think based on the size of my layout a 16 awg stranded bus wire will be sufficient. I think I am going to bite the bullet and get the SB-5 which will give me 5 amps of power and the ability to unplug the Power Cab and also add other controllers if I want to. I think with such a small layout one will be plenty.
Access to wiring will be similar to what you described for your layout. I will most likely use taps for the feeders. Plan was to have two feeders for each track at opposite ends of the layout.
The outermost oval will be 11 1/4 radius which I think should allow for our planned passenger train. The inner smaller loops will use shorter loco's and rolling stock. We have nothing smaller than 9." Obviously with this small of a layout we are a bit limited but the plan is to have 2 or 3 tracks at table height with one having a small incline and decline. The other two will be at levels 2 and 3 above the table.
We will probably do some tweaking as we start actually laying things out but that is the initial plan. If things go well, we may look to do a larger set up (or at least I might) at some point in the future.
The only unanswered question is with regard to circuit protection. Should I separate each track with its own protection or is one on the main bus sufficient for layout this small.