On the "format", this is possibly horses for courses. When I organised last year's up North it was thought best to do the run on the Saturday suspecting this might be favoured by members who had come from the South, and concourse on Sunday. (so we have not had 3 years on the new format experiment!).
However, I am more inclined to the "new" format even this year where as someone from the most east of England enjoyed Ade's route going further west giving more miles to go home after visiting Crofton. I think we did 220 miles that day with the hood down!
A more central location for the weekend should not pose problems for the Sunday drive format.
Tim