When my son sat the exam at CRGS three years ago it was a case of drop and go. We were stupidly early and he was one of the first ones to arrive. We handed him over to a group of sixth formers and left. There may have been an option to wait a little longer until there were more boys - I can't remember. DS was happy to be left chatting with the other candidates and sixth formers. I got the distinct impression that I would have cramped his style if I'd tried waiting! In fact, meeting some other boys was part of the experience for him. One of the boys he met on the day ended up in his year at school so he knew someone at the induction day. We had been prepared for some frostiness from other candidates (there is a cracking thread from way back about this) but it just wasn't like that.
The candidates for the second sitting arrived while we waited to collect DS. Drop and go did seem to be the policy. Didn't see any wailers/sobbers, just a few dads giving some last minute coaching. The whole thing was run pretty smoothly. I'm hoping the girls' school is similarly organised this year.