I don't have a track plan for this simple layout. It is only 45" x 75", but you can see how I placed my accessories. I also have a track for the milk car. I spent a lot of time trying to make it look somewhat like a city while keeping the tinplate feel. Note the custom plots for the villas and bungalow that fit in the curve.
I know Lionel has created tons of small track plans in their catalogues and other places. Not sure where to find them as a group but someone may know. There is always the temptation to cram a lot of track in a small space. But since pre-war basically runs in circles, I left a lot of space for accessories. On a 5' x 8', I would definitely do two independent loops.