It's a long way down from Sheffield !
Check that the weather will be fine, otherwise I'd advise
against it in your case.
Essentially this is a a meeting at the Beaulieu Heritage Motor Museum
for Smart enthusiasts. It's a nice venue, and there are gardens/grounds
to walk around, as well of course as the Museum itself.
There is a restaurant, where fine food and tea/coffee etc is served, for
those who didn't bring a flask and sandwiches !
Checkout the Beaulieu website for more info on the Museum and facilities.