The Labor Day holiday brought out the crowds eager to get a day of barbequing at the beach started.
But many were wary after hearing about possible plans for a temporary homeless shelter nearby.
"The idea of having a homeless camp is a good one, but not here at Sand Island,"said Guy Soares.
"This is a family area for picnics and gatherings and I don’t think it would be a good idea to bring kids around a homeless camp," he said.
Three years ago state lawmakers proposed using up to half of the state park as a safe zone for homeless but that plan was quickly shot down.
A check on the park's history shows that this wouldn’t be the first time it's been used as a temporary housing area for a large group of people.
At one time, Sand Island was used as an internment camp.
The military opened up the facility in 1941. It housed some 300 people and was closed down two years later.
Today park users say they want to know more.
Some worry about not having a safe place to bring their families to fish, or surf.
"This is like our family beach. All the families come here from all over like Pearl City, Aeia, Kalihi. It’s all family here . We have our picnics and our birthdays. There might be conflict. It may not be as safe," said Jody Segundo.
On this holiday, the parking lot is filling up fast.
Tents line the beach with large groups, some who have camping permits to be here over the long weekend.
Some families have doubts about the plan.
They think the homeless will find the area too isolated with limited bus service.
"It’s all about accessibility they are going to find that out there. And that’s why they will go back there. They know that area, they know where to hide," said Cyd Ah Mook Sang.
Some park-goers said there are already homeless who live in the brush in the far end of the park.
But they still worry about a larger encampment and the effect on the surrounding industrial community.
"When you are homeless and you fighting for your life you start doing things, you never thought you would ever do stealing, taking things. Stuff like that might happen." said Ah Mook Sang.
City officials said last week they understand the fears.
They stress that what they envision is very different from a tent city or safe zone where lawlessness is a concern.
Their plan includes wraparound services besides offering access to bathrooms, showers and a safe place to sleep.
They are negotiating with the state which owns the land at Sand Island, and said they hope to provide more details about the exact location this week.