So will there be any type of expected schedule developed for this?

I think they are trying to cram 8 hours of weigh ins into three.

Will the weigh in be cut off at 7 pm or until every group has weighed in?

Is it expected the kids that missed their groups can get in line to be weighed at 7pm?

It all seems a litttle vague and I will have to explain it to the parent so just getting prepared.