Harpswell Invasive Plant Partnership (HIPP) Workday. Meet at Williams Field on Harpswell Heritage Land Trust’s Curtis Farm, 1554 Harpswell Neck Road, Harpswell. Learn to identify and control invasive plants, and help restore our native habitats. Bring water, bug repellent, sunscreen, gloves and your favorite gardening hand tools (clippers, hand saws, etc.). FMI email firstname.lastname@example.org.