Like everything in life today, it's complicated!
Not sure the extent of your land ownership but I'd look for a line that maximizes the take off and landing run. I've seen strips parallel to a road, Shotteswell by the side of the B4100 comes to mind.
Have a thought about taking drives by surprise when leaping of the ground next to them. Also consider any hazards such as wires etc.
There's the Olympic airspace issues next year and anyway you should check any other controlled airspace nearby.
Funnily enough I was watching a You Tube video of CH701s operating off very short strips only last week; looks like the right sort of machine for your strip.
There's a wealth of knowledge on here and maybe even more on the Flyer Forum, so press on and good luck.
SGC