Here's what I can say now: your plan probably won't work well. With only a foot spacing, the antenna looks like a piece of ladder line even at ten meters.

I have to think about your typical layout a bit more, but here's what I'd keep in mind:

1. Any pattern is better than no pattern.
2. For a dipole, the highest currents are at the feed point, highest voltages at the ends; get the center as high as you can.
3. You can droop the ends, but not so low that kids can touch them by mistake.
4. Try to keep the angle between the wires to 90 degrees or greater at the feedpoint to prevent excessive cancellation.

Good luck and 73,