Soldato
if you have 100 people how many would be able to do a 300 mile journey non stop.
I would certainly stop whichever car I was in unless I was doing 120mph.
When I worked in Edinburgh, I used to drive up every now and then if I was having a long weekend in the Highlands so did the 430 mile drive from Bucks on the edge of the M25 to Edinburgh in one go