Ron Schmuck asked about staying on the grounds for the Great Dorset
Steam Fair.  When we went about ten years ago, we did, using one of
the hire firms which provides a trailer set up on a site you rent
from GDSF itself.  I'm pretty sure you cannot get either a trailer
or site at this late a date; as I recall, I booked in January.

The following website has information on "caravan hire":
  https://www.gdsf.co.uk/caravan-hire-companies/ 

Campsite information is available at
  https://www.gdsf.co.uk/camping-information/ 

Wally Venable