CAMPBELL HALL-The Orange County Arboretum off Route 416 in Campbell Hall is a small slice of Holland picked up and set down in Orange County. The tulips were in full bloom, and the traditional colors competed for recognition with a wide assortment of unusual and unexpected hues. On Sunday, June l9, area artists will showcase their own work. At least 20 artists are expected to ease their easels into place and show and sell their own works of art. You can be sure some of those artists will try to capture flowery scenes at the arboretum. More information can be obtained by calling Paula Gorton at 457-4902.