Martin,
Please explain your logic, you are basing your poor weather on the ONE time you came in April (2001) and it snowed on the Sat night / closed track Sunday.

The subsequent four times we have gone that time of year following that trip, the weather has been 100% perfect with NO rain what-so-ever. In fact this trip has been the worse weather I have ever experienced at the Ring, as there was not one full dry day .