"We're wondering who is this invisible opposition and why aren't they standing up?" asked Joy Leilei Shih from the Bamboo Bike Project.
Kauai and Maui counties already ban plastic bags from retail outlets. A ban on the Big Island kicks in next year.
If the state enacts this new law, residents on the neighbor islands would pay a fee for paper bags.
Oahu residents would pay a fee for both paper and plastic bags.