I'm visiting Great Dorset Steam Fair on that day and can offer lifts from Southampton or the immediate area.
Its worth visiting since they have a lot of stuff we need photos of and since most of the vehicles are driven its possible to get shots of them from good angles. See this category for some examples:
https://commons.wikimedia.org/wiki/Category:Great_Dorset_Steam_Fair_(2016)
We are also still looking for a first class image of a Traction engine to lead the Traction engine article:
https://en.wikipedia.org/wiki/Traction_engine