Saturday was the second night of the three-day New Jersey event.
"Last night was my first one since pre-COVID and we had an amazing time... Haven't seen Phish in two years," said Beth Heed, from Roxborough.
Many people Action News spoke with said they came from all over the country to attend.
"I want to be safe. We all want to be safe. I mean, I have four kids and a wife, but I'm here to have a great time. We turn 50," said Daniel Nabedrick-Molito of Minneapolis.
RELATED: Live concerts, large gatherings raise concerns amid rise in COVID-19 cases
Phish announced a new policy for their summer and fall tour dates. Attendees will have to provide proof of a COVID-19 vaccination or a negative test result. That starts with their next tour stop at The Gorge in Washington later this month.
"I was a little disappointed. I mean, I would have loved to have that extra security for this particular run, but you know I have my mask. I'm outside," said Isabelle Mercurio from Mount Airy.
Donny Siok of Ocean City, New Jersey, said, "I'm not that nervous about it personally, but I do think that's probably the best option right now coming through."
Many say this is the first concert they've attended since the pandemic hit and they plan to have fun in a safe way.
"It's been like a year and a half since I've been to a concert," said Todd Jordan from Seattle, WA.