It is tremendously difficult, the forecast for the next few hours seems to be changing on the hour... which is why you just can't rely on a weather forecast in this country. Personally I don't like to see matches called off unless there's actual real rain, but like you say I don't own a club. But what ever happened to preparing a track for forecasted rain, having sawdust ready in case... and dare I say it, track covers... all this 2nd guessing with what the weather is going to do is doing the sport no favours at all.
It's getting on for September and here at Leicester we've got to rearrange Kent on a day when Nicholls isn't with Buzby, Edinburgh, again and now Glasgow... and the KO Cup