Had the chance to participate in this year's tour.
There were quite a few Porsches in the tour; two 914-6's, a few speedsters.
For a Porsche fan the highpoint was Tom Grunnah's garage; he has an impressive model car collection of only Porsches; easily a a few thousands.
He has a two speedsters plus a 1960 Porsche tractor.
Here is carsinpedia's report on the tour :
http://carsinpedia.com/car_day_archi...ils.php?id=289
and a flickr album
http://www.flickr.com/photos/8292359...39910919/show/