The turnout was bigger than expected, forcing organisers to change venue at the last minute.
But despite the large attendance - and repeated requests from the floor - not a single person stood up in support of the proposal.
Picton bed and breakfast owner Gary Riggs estimated that the plans would cut his business' revenue by 70 per cent.
"Obviously there's a big adjustment for the town of Picton. Some suggest that it will die. That won't actually happen but certainly there will be total change to the situation," he told Radio New Zealand.
"Picton is largely a retirement town and so the loss of employment here will be more keenly felt."
A Ministry of Transport report on the viability of the plans is expected in April.
- nzherald.co.nz