As stateded before, the landing strip has a lot to do with wheather to fly or not in a wind. We have a paved runway. You will land on it or you will damage your plane. So, if the wind is 10+ down the runway, it a fun day. If it is 10+ across it, no way for most of us. The problem is that is is not consistant. I've seen days that I took off into the wind coming straight down the runway and landed from the end of the runway with a 60 degree cross wind that was gusting and variable direction. I've lost planes in conditions like this, miss judging my down wind speed and then stalling.

There is a good article on flying in winds in the last edition of Fly RC. Good reading.

Don