We've asked fellow teams in the past to uncrate for us.
We always travel after school on Wednesday to lessen the impact on student studies, and don't arrive at our hotel until 11pm or later.
This year we need a team to take it through inspection for us too
One potential problem in doing this for another team is-if a crate is recorded as overweight and the team wishes to protest the additional cost the crate cannot be opened until it has been reweighed by Shepard. There have been quite a few mistakes in weighing in the past.
I'd suggest the teams know each other well, and exchange cell phone numbers for last minute decisions that have to be made.