Richie's suggested power feeds look pretty good.
Another thing you probably have read is the recommendation for DCS to insulate the center rails between power feeds, thus making a bunch of isolated blocks. While well-intentioned, this really does not work well with most modern track systems like Realtrax and Fastrack. It works pretty well with old-school tubular, as long as you do it when laying the track, not later. My layout was built well before DCS, so they blocks are not insulated, and it all works quite well anyway. Also I did not star wire, and there are 2 or 3 track feeds from each power wire run, which is another DCS no-no. But as a wise man once said, hey go ahead and give it a try, you have nothing to lose. 
Rod
