Revival, best route from the West?

[gareth h]

Any advice, I'm off tomorrow, normally travel A303/M3/M27/A27, but am tempted to go Winchester / Petersfield and then cross country to Goodwood, which looks like it might miss the A27 queues, is it worth giving it a go?
Thanks
G

[gareth h]

For anybody considering this route next year, we drove straight in, very short queue, arrived circa 9am.