I composed a mission on my Android phone using Litchi. The mission was to fly around the neighborhood at 36' down the middle of the road. This altitude was at or below most of the houses and trees, no room for error. I wanted to smoothly capture the Halloween spirit from the air, with smooth panning. The speed was 4MPH, just enough for me to walk below the craft and monitor its progress throughout the 11 minute and .4 mile trip.
Panning was done using way points.
It tracked perfectly down the middle as you can see from this video. You can best see the accuracy from 2:50 to 3:50 into the video. This section of the neighborhood was a slight up hill and you can see the craft dropped below the houses, this was where the most accuracy was needed. Litchi and the P3 did not fail me.
Here is the mission....download it, unzip it and open it with Litchi.
The 10 - 12 foot wide path should not be a problem as long as you are tracking many satellites.