I fly out of Addison a lot. I am also friends with the A&P located at Airpark. A few things to remember when operating out of airpark:

 - The runway is maintained. But, it is not perfectly smooth. Treat it like a soft field. 
 - When taxiing anywhere besides the runway, you will be taxiing on turf. Protect your nose wheel. 
 - In the daytime watch out for chickens. 
 - At night, beware of coyotes. 
 - The runway has non-standard markings
 - The runway is a lot shorter than you think due to displaced thresholds at both ends due to buildings, fences, and trees.
 - The runway is aligned with the runway at Addison. You will be on a very similar final and departure leg.
 - Addison is only 3 miles away. You can almost see the Airpark area from the Addison tower.
 - Because of Addison towers Proximity to Airpark, contacting them as soon as practicable means **as soon as you start the engine.**

   non-standard markings.