The breach at Brockholes Nature Reserve last Friday caused extensive damage to several windows and doors.
And they only had a few hours to clean up the debris and fix the mess left by the thugs to ensure the site was ready for a wedding later that day.
It was the second attack in six months on the site. Last November, two crates were stolen from the nature reserve and it was forced to temporarily close for repairs.
Windows damaged in the weekend rampage had just been installed to replace glass damaged in the 2021 incident.
Alice Singleton, Brockholes Marketing Office, said: “Unfortunately Brockholes was the victim of a burglary on Friday night which caused extensive damage to the Visitor Village.
“As a nature charity, we don’t have huge resources and, like many other businesses, we are still recovering from the financial impacts of recent years.
“It is especially heartbreaking for the staff and volunteers who have spent months painting, planting and creating new features to keep the Visitor Village a special place.
“We would like to say a big thank you to our team of staff and volunteers who stepped up and worked so hard to clean up the mess and ensure the Visitor Village was safe and secure, and to our visitors for their patience while we close the Village to make these repairs on Saturday.”
Alice added: “Congratulations to David and Julie for getting married on Saturday at Brockholes and for being so understanding.
“Thank you also to the Let it Sparkle Charity Ball for hosting their special event at Brockholes, we’re so glad it went so well. Thanks to our friends at Blossom and Bloom and Margaret Mason floristry for their support and help to create the perfect day for David and Julie.
Lancashire Police have confirmed they are investigating the break-in.
Anyone with information is asked to contact police on 101 quoting LC-20220423-0180.