https://rvsafety.com/moc - this is a like for asking direct questions of the team providing services.
RV Weighing is done by appointment. We try to make it easy for the RV owner, so we make appointments when the attendees arrive at or depart from the event. This way RV owners usually do not need to move from and return to their campsite. If attendees stay later than the scheduled leaving day, then they may have to move and return to their campsite. Arrival appointments will be limited to certain days and times. If the provided arrival options do not fit with the time you will be arriving, then a departure appointment can be made.
this is the form to be filled in:
https://rvsafety.com/weight/weighing-process