Couldn't say that about the field at Mariposa, we weren't allowed to bring in a cat to level anything and the oak trees would give us a ground effect if you went over them. It was a great place to learn to fly though, if you learned there you could fly anyplace. Here in the Vegas are we fly a lot from dry lake beds and if you have a cross wind you just land into the wind direction instead of fighting the cross wind. Learn to fly on the LB and you have a very hard time at a real field. 7 sq. miles of flat will spoil you.
Mariposa was also short and down hill but we had the best fun fly events I have ever been to. The guys in the valley loved to come up the hill and get out of the fog.