The Blenheim Classic show is a static display, as a an exhibitor you need to commit to be there all day; also when I went last year focus was definitely on pre-80s cars, very few Italian classics etc. Motoring is limited to a 5mph circle of a small field (sorry "Classic Arena"), once, when your slot comes up, if you are selected. Nice enough for an hour or so, but not the same sort of day you originally suggested, with the blast round the Cotswolds etc which would be more suited to Maseratis...your first suggestion would be best for me.