I want to do this kind of thing too. I'm aiming for it in the near future. My plan is just to have paddocks in the fields (for horses) and an access road in the middle which is conveniently 12m x 600m, tarmac.
I'm going to do it ASAP. and keep the usage down for a long time. Remember if you have something in place and used 'a bit' then after 10yrs you have right to planning permission via default.
I'm aiming for somewhere rural i really want it to work. It brings the convenience of light aircraft to a whole new level when you can walk outside the house and hop into the plane!