HO scale. Walkaround layout. The benchwork is up. I'm going to start track in the largest yard.- 13' longX64''wide.(2 sided access) I want to keep about 10'' to 12''down one side for the two mainlines. all the rest will be yard. It's flat with 1/2'' homeasote. I want the yard to hold as many cars as possible. Any ideas ? pictures,books ,magizines or Posts on the Gauge that I should look at?