How's about the first or second Saturday in August? The solstice folks will have gone by then.

I kinda prefer Avebury because there is just so much to see there (and in the surrounding area) and that could be a big plus for people who haven't been to Avebury very much (or not at all).

For those who might be interested, we could do some mini trips to see the sarsens under the Alton Priors and Pewsey churches, as well as look at the Winterbourne Bassett circle and the Winterbourne Monkton 'goddess' again.

And then there's the Valley of Dreams - the perfect place for a picnic but impossible for parking.