I found the activity day was too many people (25 cars) and the training day too few (4 cars). I think the activity day with 8-15 would be absolutely perfect for accessible to all fun and could easily be combined with a post-event pub meet nearby too.
They offer very few weekend slots (airfield in use as airfield on weekend!) so we'd probably be looking at a Monday, starting 10am running till 4. I'm thinking April once those of you who hibernate for the winter are back in business ;)
The airfield is easy to get to, just off the M11 Harlow junction. 1h 45 from Oxford, Peterborough, Norwich, Folkestone, Brighton, Crawley, Reading which gives a pretty big range. In theory it's only 2 hours from Southampton - although I don't know about doing that time @ 9am on a Monday ;)
If there are few folks interested from here I'll post it in the breakfast club too and see if I get any takers there, already have 2 possibly 3 from work colleagues. I think 8 would be the minimum - should be about £120 a car at that level.
Roll on 2017 :)
Jess